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183 results on '"Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet)"'

1. Modelling of cyclic visco-elasto-plastic behaviour of coated woven fabrics under biaxial loading and finite strain

Author: Arnaud Blaise, W. Dib, G. Bles, A. Tourabi, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Recherche Dupuy de Lôme (IRDL), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: Weaving, Finite element method, Materials science, Synthetic fibres, 020101 civil engineering, 02 engineering and technology, Synthetic fibers, engineering.material, Non Newtonian flow, 0201 civil engineering, Coating, Woven fabric, Yarn, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Cyclic loading, General Materials Science, Cyclic loads, Composite material, Anisotropy, business.industry, Textiles, Applied Mathematics, Mechanical Engineering, Elasto plastic, Behaviour of sailcloth materials, Structural engineering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Synthetic fiber, Mechanics of Materials, Modeling and Simulation, Finite strain theory, engineering, ABAQUS, 0210 nano-technology, business, Finite element code, Plastic coatings
Abstract: International audience; This paper deals with the modelling of the mechanical behaviour of coated woven fabric. The proposed model takes into account the individual behaviours of the yarns, the coating and their interactions including the influence of the angle variation between warp and weft yarns. This model is able to describe simultaneously the non-Newtonian viscous behaviour, the time-independent irreversibility, the anisotropy and the cyclic loading behaviour. The model was implemented in the finite element code ABAQUS and enables calculations on structures such as complete sails.
Published: 2018

2. Inner Resonance in Media Governed byHyperbolic and Parabolic Dynamic Equations.Principle and Examples

Author: Guy Bonnet, Claude Boutin, Jean-Louis Auriault, ENTPE, DGCB, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), In book edited by : Holm Altenbach, Joël Pouget, Martine Rousseau, Bernard Collet, Thomas Michelitsch, Département génie civil et batiment (DGCB), ENTP, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Holm Altenbach, and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM)
Subjects: Physics, Momentum transfer, effective behaviour, homogenization, Composite media, 02 engineering and technology, [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph], 021001 nanoscience & nanotechnology, 01 natural sciences, Homogenization (chemistry), Classical mechanics, Mass transfer, 0103 physical sciences, Dissipative system, Modeling and design, 0210 nano-technology, 010301 acoustics, Dynamic equation, inner resonance, [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the solides [physics.class-ph], Asymptotic homogenization
Abstract: International audience; This chapter deals with the modeling and design of inner resonance media, i.e. media that present a local resonance which has an impact on the overall dynamic behaviour. The aim of this chapter is to provide a synthetic picture of the inner resonance phenomena by means of the asymptotic homogenization method (Sanchez-Palencia, 1980). The analysis is based on the comparative study of a few canonical realistic composite media. This approach discloses the common principle and the specific features of different inner resonance situations and points out theirconsequences on the effective behavior. Some general design rules enabling to reach such a specific dynamic regime with a desired effect are also highlighted. The paper successively addresses different materials having different behaviours and inner structures as elastic composites, reticulated media, permeable rigid and elastic media, undergoing phenomena governed either by momentum transfer or/and mass transfer, in which the inner resonance mechanisms can be highly or weakly dissipative, in situation of inner resonance or inner anti-resonance.
Published: 2018

3. Force fluctuations on a wall in interaction with a granular lid-driven cavity flow

Author: Frédéric Dufour, Nicolas Eckert, Thierry Faug, Mohamed Naaim, Gilles Nicolet, François Kneib, Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), School of Civil Engineering, The University of Sydney, Développement des territoires montagnards (UR DTGR), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: Shearing (physics), Physics, granular flow, Inertial frame of reference, Scale (ratio), Flow (psychology), Dynamics (mechanics), Boundary (topology), impact force, Mechanics, 01 natural sciences, 010305 fluids & plasmas, [SPI.MAT]Engineering Sciences [physics]/Materials, Physics::Fluid Dynamics, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], 0103 physical sciences, [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, Particle, [SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures, 010306 general physics, numerical model, [SPI.GCIV.GCN]Engineering Sciences [physics]/Civil Engineering/Génie civil nucléaire, Quasistatic process, discret element method
Abstract: International audience; The force fluctuations experienced by a boundary wall subjected to a lid-driven cavity flow are investigated by means of numerical simulations based on the discrete element method. The time-averaged dynamics inside the cavity volume and the resulting steady force on the wall are governed by the boundary macroscopic inertial number, the latter being derived from the shearing velocity and the confinement pressure imposed at the top. The force fluctuations are quantified through measuring both the autocorrelation of force time-series and the distributions of grain-wall forces, at distinct spatial scales from particle-scale to wall-scale. A key result is that the grain-wall force distributions are entirely driven by the boundary macroscopic inertial number, whatever the spatial scale considered. In particular, when the wall-scale is considered, the distributions are found to evolve from nearly exponential to nearly Gaussian distributions by decreasing the macroscopic inertial number. The transition from quasistatic to dense inertial flow is well identified through remarkable changes in the shapes of the distributions of grain-wall forces, accompagnied by a loss of system memory in terms of the mesoscale force transmitted toward the wall.
Published: 2017

4. Stretching the Boundaries of Bio-elasticity

Author: Hugo Leroux, Romain Debret, Didier Letourneur, Ludwik Leibler, Lucie Bailly, Martine Pithioux, Jean-François Aubry, Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique UMR 5305 (LBTI), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Recherche Vasculaire Translationnelle (LVTS (UMR_S_1148 / U1148)), Université Paris 13 (UP13)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut des Sciences du Mouvement Etienne Jules Marey (ISM), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Institut Langevin - Ondes et Images (UMR7587) (IL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot - Paris 7 (UPD7)-Université Paris 13 (UP13)-Institut National de la Santé et de la Recherche Médicale (INSERM), ESPCI ParisTech-Centre National de la Recherche Scientifique (CNRS), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut Langevin - Ondes et Images, Université Paris Diderot - Paris 7 (UPD7)-ESPCI ParisTech-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Bailly, Lucie
Subjects: [SDV] Life Sciences [q-bio], [SDV.MHEP.AHA] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SDV]Life Sciences [q-bio], [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2017

5. Strain-space multi-surface Saint-Venant model to describe multiaxial elastic-plastic cyclic behavior

Author: Corado Ningre, Guilhem, Jean-Baptiste Bles, Ali Tourabi, Didier Imbault, Institut de Recherche Dupuy de Lôme (IRDL), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Brest (UBO)-Université de Bretagne Sud (UBS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), and Briec, Marie
Subjects: [PHYS]Physics [physics], [PHYS.MECA]Physics [physics]/Mechanics [physics], [PHYS.MECA] Physics [physics]/Mechanics [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract: International audience
Published: 2017

6. Numerical homogenization of the viscoplastic behavior of snow based on X-ray tomography images

Author: A. Wautier, C. Geindreau, F. Flin, Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre d'Etudes de la Neige (CEN), Centre national de recherches météorologiques (CNRM), Météo France-Centre National de la Recherche Scientifique (CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), AgroParisTech, Centre National de la Recherche Scientifique (CNRS), Appeared in source as:3SR lab is part of the LabEx Tec 21 (Investissements d'Avenir), ANR-10-LABX-0056,OSUG@2020,Innovative strategies for observing and modelling natural systems(2010), and ANR-11-EITS-0003,DataBridges(2011)
Subjects: 010504 meteorology & atmospheric sciences, Constitutive equation, 02 engineering and technology, 01 natural sciences, Homogenization (chemistry), Physics::Geophysics, 0203 mechanical engineering, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Geotechnical engineering, Boundary value problem, Elasticity (economics), lcsh:Environmental sciences, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, lcsh:GE1-350, Viscoplasticity, lcsh:QE1-996.5, Mechanics, Snowpack, Snow, lcsh:Geology, 020303 mechanical engineering & transports, 13. Climate action, [SDU]Sciences of the Universe [physics], Tomography, Astrophysics::Earth and Planetary Astrophysics, Geology
Abstract: While the homogenization of snow elastic properties has been widely reported in the literature, homogeneous rate-dependent behavior responsible for the densification of the snowpack has hardly ever been upscaled from snow microstructure. We therefore adapt homogenization techniques developed within the framework of elasticity to the study of snow viscoplastic behavior. Based on the definition of kinematically uniform boundary conditions, homogenization problems are applied to 3-D images obtained from X-ray tomography, and the mechanical response of snow samples is explored for several densities. We propose an original post-processing approach in terms of viscous dissipated powers in order to formulate snow macroscopic behavior. Then, we show that Abouaf models are able to capture snow viscoplastic behavior and we formulate a homogenized constitutive equation based on a density parametrization. Eventually, we demonstrate the ability of the proposed models to account for the macroscopic mechanical response of snow for classical laboratory tests.
Published: 2017

7. Sensitivity analysis of the Thermo-Hydro-Mechanical parameters affecting double walled Nuclear Power Plants behaviour

Author: Bouhjiti, David, El Mahdi, Baroth, Julien, Dufour, Frédéric, Masson, Benoit, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Dufour, Frédéric
Subjects: [SPI.GCIV.STRUCT] Engineering Sciences [physics]/Civil Engineering/Structures, [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.GCIV.GCN] Engineering Sciences [physics]/Civil Engineering/Génie civil nucléaire, [SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures, [SPI.GCIV.RISQ] Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.GCIV.GCN]Engineering Sciences [physics]/Civil Engineering/Génie civil nucléaire, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2017

8. Numerical investigations of the force experienced by a wall subject to granular lid-driven flows: regimes and scaling of the mean force

Author: Kneib, François, Faug, Thierry, Dufour, Frédéric, NaaÏm, Mohamed, Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), School of Civil Engineering, The University of Sydney, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Développement des territoires montagnards (UR DTGR), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures, [SPI.GCIV.GCN]Engineering Sciences [physics]/Civil Engineering/Génie civil nucléaire, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience
Published: 2016

9. Numerical efficiency of non-differentiable constitutive law : Application to Mazars Unilateral damage model

Author: Chandra, Johanes, Dufour, Frédéric, Grange, Stéphane, Institut des Sciences de la Terre (ISTerre), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique des Matériaux et des Structures (M2S), Géomécanique, Matériaux et Structures (GEOMAS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-PRES Université de Grenoble-Institut de recherche pour le développement [IRD] : UR219-Institut national des sciences de l'Univers (INSU - CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université Joseph Fourier - Grenoble 1 (UJF), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and Dufour, Frédéric
Subjects: [SPI.GCIV.STRUCT] Engineering Sciences [physics]/Civil Engineering/Structures, [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.GCIV.RISQ] Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience; In non linear concrete structure modeling, an efficient numerical resolution scheme is as important as thechoice of the constitutive law. When using Newton-Raphson approach, providing tangent stiffness matrix iscrucial to improve the numerical efficiency related to the iterative process. However, non-differentiablerelations are often encountered (e.g. the Macauley bracket or absolute operator) does not allow the analyticalderivation of the tangent matrix.In this study, three strategies are proposed and compared to deal with this issue. These strategies are appliedto the Mazars Unilateral damage model (Mazars et al., 2015) that has non-differentiable operators in themodel. The first solution is to assume a radial loading path, the second is to analytically regularize the non-differentiable functions and finally is the use of numerical differentiation. The numerical implementation isperformed in Code_Aster finite element software. The performance of the proposed approaches are thencompared in terms of convergence rate, robustness, and computational time at both the elementary level andstructural level. In elementary level, all methods present quadratic convergence for radial loading, but onlythe numerical estimation keep this convergence rate for any loading trajectories. In structural level of areinforced concrete beam in bending with local model, the occurrence of micro snap-backs due to crackingof an element introduces convergence difficulties and hence further strategies are needed.
Published: 2016

10. Development and evaluation of an experimental protocol for 3-D visualization and characterization of the structure of bacterial biofilms in porous media using laboratory X-ray tomography

Author: Philippe Séchet, Tomislav Ivanković, Zhujun Huang, Jean M.F. Martins, Sabine Rolland du Roscoat, Christian Geindreau, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Department of Biology [Zagreb], Faculty of Science [Zagreb], University of Zagreb-University of Zagreb, Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI ), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Univ Zagreb, Fac Sci, Div Biol, Zagreb 41000, Croatia, University of Zagreb, Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: 0301 basic medicine, Materials science, X-ray microtomography, Biofilms growth and development, Surface Properties, 030106 microbiology, Contrast Media, Nanotechnology, Aquatic Science, Naphthalenes, Applied Microbiology and Biotechnology, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], 03 medical and health sciences, Imaging, Three-Dimensional, Porous Media, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS, Water Science and Technology, Pseudomonas putida, 3 d visualization, Biofilm, technology, industry, and agriculture, X-Ray Microtomography, Models, Theoretical, biochemical phenomena, metabolism, and nutrition, Microstructure, Characterization (materials science), 030104 developmental biology, Biofilms, Biofilter, Tomography, Porous medium, Laboratories, Porosity, biofilm, X-ray tomography
Abstract: The development of a reliable model allowing accurate predictions of biofilm growth in porous media relies on a good knowledge of the temporal evolution of biofilm structure within the porous network. Since little is known about the real 3-D structure of biofilms in porous media, this work was aimed at developing a new experimental protocol to visualize the 3-D microstructure of the inside of a porous medium using laboratory X-ray microtomography. A reliable and reproducible methodology is proposed for (1) growing a biofilm inside a porous medium, and (2) X-ray tomography-based characterization of the temporal development of the biofilm at the inlet of the biofilter. The statistical analysis proposed here also validates the results presented in the literature based on a biofilm structure single measurement.
Published: 2016

11. Fabrication of Namib Beetle Inspired Biomimetic Amphi-phobic Surfaces Using Adsorbed Water as a Monomer

Author: Martin M. Thuo, Jiahao Chen, Ian D. Tevis, Jean-Francis Bloch, Stephanie Oyola-Reynoso, Iowa State University (ISU), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), and bloch, jean-francis
Subjects: Materials science, [SPI] Engineering Sciences [physics], 02 engineering and technology, [SPI.MAT] Engineering Sciences [physics]/Materials, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Adsorption, Polymer chemistry, Monolayer, Molecule, hydrophobic, namib beetle, oleophobic, Engineering(all), ComputingMilieux_MISCELLANEOUS, wetting, textured surfaces, amphi-phobic, General Medicine, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, Surface energy, 0104 chemical sciences, Monomer, chemistry, Chemical engineering, Polymerization, Reagent, Wetting, 0210 nano-technology
Abstract: Chemical grafting of small molecule reagents onto polymeric fibrous materials, like paper, has been used to modify their wetting properties. Several reagents like trichlorosilanes, which can react with water or hydroxyls, have been used with the expectation that a monolayer, single molecule or polymerized single-molecule layer, is formed on the paper fiber surface. Presence of adsorbed water, however, would complicate the formation of a monolayer, especially in case of polyvalent reagents. We hypothesized that adsorbed water is a good co-monomer for polyvalent water-reactive reagents, therefore chemical grafting with polyvalent molecules would give polymeric gels instead of a monolayer. Reaction of trivalent reagents with paper in vacuo leads to formation of polymeric gels. By optimizing surface energy mismatch, through felicitous choice of chemical moieties on the monomer, self-assembly leads to formation of nano- to micro particles on the surface of paper fibers. We observe that, as expected, the wetting properties correlate well with the size and distribution of particles. We conclude that the recently reported ultra-hydrophobicity of chemically modified paper is not only due to inherent roughness of the paper fibers, but also due to a secondary roughness introduced by surface polymerization. Using this technique, we prepared amphi-phobic biomimetic surfaces inspired by the namib beetle. This talk will also address potential utility of such surfaces.
Published: 2016

12. Force fluctuations experienced by a boundary wall subjected to a granular flow in two distinct systems

Author: Mohamed Naaim, François Kneib, Thierry Faug, Frédéric Dufour, Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: Physics, Shearing (physics), Inertial frame of reference, QC1-999, Dynamics (mechanics), Flow (psychology), Boundary (topology), Probability density function, 02 engineering and technology, Mechanics, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 01 natural sciences, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Physics::Fluid Dynamics, Rheology, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Statistical physics, 010306 general physics, Quasistatic process
Abstract: International audience; The present paper describes a numerical study of force fluctuations experienced by a boundary wall subjected to a granular flow on two distinct systems, namely a lid-driven cavity and an immersed wall system. Though the two systems exhibit different time-averaged dynamics, the force fluctuations experienced by the boundary wall show robust features in terms of the shapes of the probability density distributions and auto-correlation functions, under a wide range of boundary confinement pressure and shearing velocity imparted to the granular flow at the top of the system. This study identifies the key link between the grain-wall force fluctuations and the μ(I)−rheology while moving from quasistatic to inertial regime.
Published: 2017

13. Hybrid Silver Nanowire–CMC Aerogels: From 1D Nanomaterials to 3D Electrically Conductive and Mechanically Resistant Lightweight Architectures

Author: Maribel Touron, Caroline Celle, Laurent Orgéas, Jean-Pierre Simonato, ARC-Nucleart CEA Grenoble (NUCLEART), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), and Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )
Subjects: General Engineering, General Physics and Astronomy, General Materials Science, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: The directed assembly of nanomaterials into 3D architectures is a powerful tool to produce macroscopic materials with tailored physical properties. We show in this article that such a process can be advantageously performed for the fabrication of lightweight electrically conductive materials. Silver nanowire aerogels (AgNWAs) with very low densities (down to ∼6 mg cm
Published: 2022

14. Ultrasonic welding of folding boxboards

Author: Martine Rueff, Barthélémy Harthong, Jérémie Viguié, Marie Caron, David Guérin, Robert Peyroux, Didier Imbault, Claire Monot, Quentin Charlier, Julien Bras, Laurence Leroy, Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Centre Technique du Papier (CTP), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), and Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )
Subjects: 0106 biological sciences, Environmental Engineering, Thermoplastic, Materials science, Thermosetting polymer, Bioengineering, Context (language use), Welding, engineering.material, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, Coating, law, 010608 biotechnology, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Composite material, Waste Management and Disposal, 040101 forestry, chemistry.chemical_classification, Ultrasonic welding, 04 agricultural and veterinary sciences, Environmentally friendly, chemistry, engineering, 0401 agriculture, forestry, and fisheries, Adhesive
Abstract: International audience; Today’s environmental concerns are pressuring industries to substitute paper-based materials in place of plastics in many sectors including packaging. However, assembling papers and paperboards using environmentally friendly solutions remains a technological challenge. In this context, ultrasonic (US) welding is an alternative to adhesives. In this work, the potential of US welding to assemble folding boxboards was investigated. Folding boxboards are commonly coated to enhance printability. This coating is generally composed of mineral pigments (85 to 90%) and polymer binders (10 to 12%). This study evaluated whether the presence of the coating layer allows the assembly of paperboards by US welding. Results indicated that welding coated folding boxboards is possible provided that coating weight and binder content are high enough. The mechanical performances of the welded boards met the requirements of most packaging applications. Adhesion in the welded joint resulted from a combination of thermoplastic (melting and flowing of the binder) and thermoset (degradation reactions) effects. However, it was not possible to assemble coated folding boxboards without degrading the welding zone. While the materials and process need to be optimized, this work represents a big step forward toward the adhesive-free assembling of paper-based materials.
Published: 2021

15. Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Author: Dorian Depriester, Sabine Rolland du Roscoat, Laurent Orgéas, Christian Geindreau, Benjamin Levrard, Florian Brémond, Mechanics surfaces and materials processing (MSMP), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Arts et Métiers Paristech ENSAM Aix-en-Provence, European Synchrotron Radiation Facility (ESRF), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Société Michelin, Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), and Michelin/projet PHARE
Subjects: 3D fibrous materials, Histology, Matériaux [Sciences de l'ingénieur], x-ray, Contact identification, Microstructural descriptors, Fibre separation, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Traitement du signal et de l'image [Sciences de l'ingénieur], [SPI.MAT]Engineering Sciences [physics]/Materials, Pathology and Forensic Medicine
Abstract: International audience; Modelling the physical behaviour of fibrous materials still remains a great challenge because it requires to evaluate the inner structure of the different phases at the phase scale (fibre or matrix) and the at constituent scale (fibre). X-ray Computed Tomography (CT) imaging can help to characterize and to model these structures, since it allows separating the phases, based on the grey level of CT scans. However, once the fibrous phase has been isolated, automatically separating the fibres from each other is still very challenging. This work aims at proposing a method which allows separating the fibres and localizing the fibre-fibre contacts for various fibres geometries, that is: straight or woven fibres, with circular or non circular cross sections, in a way that is independent of the fibres orientations. This method uses the local orientation of the structure formed by the fibrous phase and then introduces the misorientation angle. The threshold of this angle is the only parameter required to separate the fibres. This paper investigates the efficiency of the proposed algorithm in various conditions, for instance by changing the image resolution or the fibre tortuosity on synthetic images. Finally, the proposed algorithm is applied to real images or samples made up of synthetic solid fibres.
Published: 2022

16. Cascading (3D) reconstruction procedure of composite structures from microtomography data

Author: Kabbej, Marouane, Guillard, Valérie, Angellier-Coussy, Hélène, Thoury-Monbrun, Valentin, Gontard, Nathalie, Orgéas, Laurent, Rolland Du Roscoat, Sabine, Gaucel, Sébastien, Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011), ANR-16-CARN-0025,PolyNat Carnot Institute,PolyNat Carnot Institute(2011), and European Project: 773375,H2020,GLOPACK(2018)
Subjects: Medical Laboratory Technology, Heterogeneous size distribution, Clinical Biochemistry, (3D) Structure building, Particle morphology, (3D) tri-phasic structure, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience; Reconstruction of three-dimensional (3D) structure from experimental image acquisition (e.g., from micro computed tomography data) is very useful in composite material science. Composite considered are characterized by a dispersion of particles in a continuous phase. Many properties of the composite (e.g., mass transfer properties) depend on its structural assembly. A reliable prediction of these properties requires to well represent this structure and especially, the region at the vicinity of the dispersed phase. (3D) structure generation must thus permit to (1) simplify the real composite structure observed to make it compatible with further modelling tasks (e.g., meshing constraints in finite elements methods, computation time) and (2) keep enough representativeness of the structure of the specimen to produce reliable numerical predictions. This article describes an innovative, cascading (3D) reconstruction procedure of composite material from microtomography data. • First step of this pipeline is the extraction of relevant structural markers from microtomography images using image analysis. • Second step is the modelling of the distribution of the structural markers selected (statistical laws). • Third and final step is the reconstruction of the (3D) structures based on the pre-determined distribution laws in a RVE (representative volume element) of the composite.
Published: 2023

17. Bio-based composites made from bamboo fibers with high lignin contents: a multiscale analysis

Author: Jerachard, Kaima, Eder, Castro, Cécile, Sillard, Terrien, Maxime, Viguié, Jérémie, Mauret, Evelyne, Peyroux, Robert, Charlier, Quentin, Preechawuttipong, Itthichai, Dufresne, Alain, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Chiang Mai University (CMU), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), and Peyroux, Robert
Subjects: [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience
Published: 2021

18. On the role of fibre bonds on the elasticity of low-density papers: a micro-mechanical approach

Author: S. Le Corre, Pierre J.J. Dumont, Florian Martoïa, Laurent Orgéas, C. Marulier, Denis Caillerie, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Laboratoire de Thermique et d’Energie de Nantes (LTeN), Ecole Polytechnique de l'Université de Nantes (EPUN), and Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, Materials science, Polymers and Plastics, Scale (ratio), 02 engineering and technology, 021001 nanoscience & nanotechnology, Microstructure, 01 natural sciences, Moduli, Shear (sheet metal), [SPI]Engineering Sciences [physics], Planar, Deformation mechanism, 010608 biotechnology, Composite material, Elasticity (economics), 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Stiffness matrix
Abstract: Fine prediction of the elastic properties of paper materials can now be obtained using sophisticated fibre scale numerical approaches. However, there is still a need, in particular for low-density papers, for simple and compact analytical models that enable the elastic properties of these papers to be estimated from the knowledge of various structural information about their fibres and their fibrous networks. For that purpose, we pursued the analysis carried out in Marulier et al. (Cellulose 22:1517–1539, 2015. https://doi.org/10.1007/s10570-015-0610-6 ) with low-density papers that were fabricated with planar random and orientated fibrous microstructures and different fibre contents. The fibrous microstructures of these papers were imaged using X-ray synchrotron microtomography. The corresponding 3D images revealed highly connected fibrous networks with small fibre bond areas. Furthermore, the evolutions of their Young’s moduli were non-linear and evolved as power-laws with the fibre content. Current analytical models of the literature do not capture these trends. In light of these experimental data, we developed a fibre network model for the in-plane elasticity of papers in which the main deformation mechanisms of the micromechanical model is the shear of the numerous fibre bonds and their vicinity, whereas the fibre parts far from these zones were considered as rigid bodies. The stiffness tensor of papers was then estimated both numerically using a discrete element code and analytically using additional assumptions. Both approaches nicely fit the experimental trends by adjusting a unique unknown micromechanical parameter, which is the shear stiffness of bonding zones. The estimate of this parameter is relevant in light of several recently reported experimental results.
Published: 2021

19. Chain-mail fabric stiffens under confining pressure

Author: Laurent Orgéas, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0303 health sciences, Multidisciplinary, Materials science, Textiles, fungi, education, Jamming, 02 engineering and technology, 021001 nanoscience & nanotechnology, Overburden pressure, humanities, 03 medical and health sciences, [SPI]Engineering Sciences [physics], Chain (algebraic topology), Materials Testing, Humans, Postal Service, Composite material, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology
Abstract: The mechanical properties of chain mail have been revisited. The findings reveal that, under confining pressure, chain-mail-inspired materials can switch from pliable to stiff structures that have outstanding load-bearing capacities. Pliable materials that undergo a jamming transition.
Published: 2021

20. Experimental investigation and process optimization of the ultrasonic welding applied to papers

Author: Barthélémy Harthong, J. Viguié, M. Terrien, Robert Peyroux, Didier Imbault, Quentin Charlier, J.‐B. Toni, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Centre Technique du Papier (CTP), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)
Subjects: 010302 applied physics, instrumentation, Ultrasonic welding, Materials science, Mechanical Engineering, paper, paperboard, Mechanical engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, experimentation, Mechanics of Materials, process optimization, 0103 physical sciences, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], General Materials Science, Process optimization, 0210 nano-technology
Abstract: International audience; Ultrasonic welding is a serious candidate in the development of methods to assemble papers and paperboards without using additional substances. However, the ultrasonic welding of papers remains a technological challenge considering the low weldability of lignocellulosic materials. This study aims to investigate on the ultrasonic welding process applied to papers in order to identify the processing conditions which favor the formation of strong welded joints. To reach such purpose, an experimental strategy was developed by combining the characterization of welded materials and the monitoring of process parameters. Experimentations were performed using a reference paper displaying a good weldability to specifically highlight the contribution of process parameters. Results indicate that the process is highly sensitive to vibration amplitude, power supplied by the high frequency generator, and sample thickness. Power seems to be a reliable indicator of the severity of the process. A strong decrease in the strength of the welded joints is observed when working with low thicknesses. It seems that the layers coated on top of papers are the main part of the material contributing in the development of adhesion at the welding joint. Overall, instrumenting the device has led to a better understanding of the ultrasonic welding of papers.
Published: 2021

21. Reconstructing patient-specific cerebral aneurysm vasculature for in vitro investigations and treatment efficacy assessments

Author: Cory M. Kelly, Luke K Johnson, Christian Geindreau, Venkat Keshav Chivukula, Michael Barbour, Kurt Sansom, Alberto Aliseda, Michael R. Levitt, Sabine Rolland du Roscoat, Louis J. Kim, Alicia Clark, Department of Mechanical Engineering [University of Washington], University of Washington [Seattle], Department of Neurological Surgery, University of Washington, Seattle, WA, USA., Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Department of Neurological Surgery, University of Washington, Seattle, WA, Department of Radiology, University of Washington, Seattle, WA, and Department of Neurological Surgery, University of Washington, Seattle, WA, USA
Subjects: in vitro study, Hemodynamics, Lumen (anatomy), Surgical planning, Article, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], 03 medical and health sciences, 0302 clinical medicine, Aneurysm, Physiology (medical), [PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph], Humans, Medicine, cardiovascular diseases, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Radiation treatment planning, Phantoms, Imaging, business.industry, Models, Cardiovascular, Intracranial Aneurysm, General Medicine, Blood flow, aneurysm vasculature, medicine.disease, Treatment efficacy, Cerebral Angiography, Neurology, X-ray microtomography, 030220 oncology & carcinogenesis, Rotational angiography, Printing, Three-Dimensional, Surgery, Neurology (clinical), business, 030217 neurology & neurosurgery, Biomedical engineering
Abstract: International audience; Perianeurysmal hemodynamics play a vital role in the initiation, growth and rupture of intracranial aneurysms. In vitro investigations of aneurysmal hemodynamics are helpful to visualize and measure blood flow, and aiding surgical planning approaches. Improving in vitro model creation can improve the feasibility and accuracy of hemodynamic investigations and surgical planning, improving clinical value. In this study, in vitro models were created from three-dimensional rotational angiography (3DRA) of six patients harboring intracranial aneurysms using a multi-step process involving 3D printing, index of refraction matching and silicone casting that renders the models transparent for flow visualization. Each model was treated with the same commercially-available, patient-specific, endovascular devices (coils and/or stents). All models were scanned by synchrotron X-ray microtomography to obtain high-resolution imaging of the vessel lumen, aneurysmal sac and endovascular devices. Dimensional accuracy was compared by quantifying the differences between the microtomographic reconstructions of the fabricated phantoms and the original 3DRA obtained during patient treatment. True-scale in vitro flow phantoms were successfully created for all six patients. Optical transparency was verified by using an index of refraction matched working fluid that replicated the mechanical behavior of blood. Synchrotron imaging of vessel lumen, aneurysmal sac and endovascular devices was successfully obtained, and dimensional errors were found to be O(100 μm). The creation of dimensionally-accurate, optically-transparent flow phantoms of patient-specific intracranial aneurysms is feasible using 3D printing technology. Such models may enable in vitro investigations of aneurysmal hemodynamics to aid in treatment planning and outcome prediction to devise optimal patient-specific neurointerventional strategies.
Published: 2019

22. Rapid Prototyping of Reconfigurable Microfluidic Channels in Undercooled Metal Particle-Elastomer Composites

Author: Boyce S. Chang, Mario Fratzl, Andrew Martin, Andrea F. Boyer, Henry C. Ahrenholtz, Nora M. Dempsey, Jean-Francis Bloch, Isabelle de Moraes, Martin M. Thuo, Iowa State University (ISU), Micro et NanoMagnétisme (MNM ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Department of Computer Science, University of Oxford [Oxford], Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: Rapid prototyping, Materials science, Single use, Fabrication, General Chemical Engineering, Microfluidics, Nanotechnology, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, Industrial and Manufacturing Engineering, [SPI.MAT]Engineering Sciences [physics]/Materials, Elastomer composites, 020401 chemical engineering, Microfluidic channel, Hardware_INTEGRATEDCIRCUITS, 0204 chemical engineering, 0210 nano-technology, Metal particle, ComputingMilieux_MISCELLANEOUS
Abstract: Conventional fabrication of microfluidic channels/devices faces challenges such as single use channels, material incompartibility, and/or significant time consumption. We propose a flexible platfor...
Published: 2019

23. In situ 3D observations of capillary-driven flows in parallel arrangements of rigid fibres using X-ray microtomography

Author: Balbinot, Chiara, Martoïa, Florian, Dumont, Pierre J.J., Orgéas, Laurent, Bloch, Jean-Francis, Rolland Du Roscoat, Sabine, Boller, Elodie, Flin, Frédéric, Carion, Pauline, Latil, Pierre, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), European Synchroton Radiation Facility [Grenoble] (ESRF), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), and Novitom [Grenoble]
Subjects: CT Analysis, Transport Phenomena Analysis, Surface tension, Mechanics of Materials, Ceramics and Composites, Capillary forces, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract: International audience; Capillary-driven impregnation phenomena occurring in fibre bundles during the processing of composite materials are complex and still not fully understood. Hence, synchrotron X-ray microtomography was used to characterise the longitudinal propagation of the flow front within a parallel arrangement of rigid fibres. The analysis of 3D images enabled the fluid-air interface curvatures, triple line lengths, and local contact angles to be quantified during wetting and dewetting experiments. The results showed that even in quasi-static situations, local contact angles exhibited significant variations along the fibres. These variations also depended on the wetting/dewetting state. The transverse capillary forces measured at the fibre scale from the analysis of 3D images were shown to be of the same order of magnitude as the longitudinal capillary forces. Local curvatures of the fluid-air interface and the resulting estimate of the average capillary pressure proved the relevance of a mesoscale capillary pressure model adapted for fibre bundles.
Published: 2022

24. The use of x-ray tomography to investigate soil deformation around growing roots

Author: Floriana Anselmucci, Nicolas Lenoir, R. Peyroux, Gioacchino Viggiani, Chloé Arson, Luc Sibille, Edward Andò, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), GéoMécanique, Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), and Georgia Institute of Technology [Atlanta]
Subjects: 021110 strategic, defence & security studies, 0211 other engineering and technologies, 02 engineering and technology, Root system, 15. Life on land, Deformation (meteorology), Geotechnical Engineering and Engineering Geology, [SPI]Engineering Sciences [physics], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Earth and Planetary Sciences (miscellaneous), Geotechnical engineering, Tomography, Shear strength (discontinuity), Geology, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering
Abstract: The increased shear strength of rooted soil recently inspired researchers to assess the stability of vegetated slopes with continuum models and to design anchors by mimicking root system architectu...
Published: 2021

25. Design of fibre-reinforced biomaterials based on novel hydrogels to mimic the vocal folds properties

Author: Angulo, Daniel, Yousefi-Mashouf, Hamid, Bailly, Lucie, Orgéas, Laurent, Sohier, Jérôme, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), and Bailly, Lucie
Subjects: [CHIM.MATE] Chemical Sciences/Material chemistry, Mechanical characterisation, Hydrogels for TE applications, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Composites and nanocomposites, [CHIM.MATE]Chemical Sciences/Material chemistry, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2020

26. Mechanics of human vocal folds layers during finite strains in tension, compression and shear

Author: Yohann Robert, Laurent Orgéas, Lucie Bailly, Nathalie Henrich Bernardoni, M. Terrien, Thibaud Cochereau, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), GIPSA - Analyse et Modification de l'homme en mouvement : biomécanique, cognition, vocologie (GIPSA-MOVE), GIPSA Pôle Sciences des Données (GIPSA-PSD), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Laboratoire d'Anatomie des Alpes Françaises (LADAF), CHU Grenoble, Université Grenoble Alpes - UFR Médecine (UGA UFRM), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), and ANR-17-CE19-0015,MicroVoice,De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique(2017)
Subjects: Materials science, 0206 medical engineering, Biomedical Engineering, Biophysics, Mechanical tests, 02 engineering and technology, Vocal Cords, 03 medical and health sciences, 0302 clinical medicine, Phonation, medicine, Pressure, Humans, Orthopedics and Sports Medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Anisotropy, Lamina propria, Rehabilitation, Vocal folds, Compression, Soft tissue, Shear, Mechanics, Strain rate, 020601 biomedical engineering, Biomechanical Phenomena, Shear (sheet metal), Transverse plane, medicine.anatomical_structure, Tension, Stress, Mechanical, 030217 neurology & neurosurgery
Abstract: International audience; During phonation, human vocal fold tissues are subjected to combined tension, compression and shear loadings modes from small to large finite strains. Their mechanical behaviour is however still not well understood. Herein, we complete the existing mechanical database of these soft tissues, by characterising, for the first time, the cyclic and finite strains behaviour of the lamina propria and vocalis layers under these loading modes. To minimise the inter or intra-individual variability, particular attention was paid to subject each tissue sample successively to the three loadings. A nonlinear mechanical behaviour is observed for all loading modes : a J-shape strain stiffening in longitudinal tension and transverse compression, albeit far less pronounced in shear, stress accommodation and stress hysteresis whatever the loading mode. In addition, recorded stress levels during longitudinal tension are much higher for the lamina propria than for the vocalis. Conversely, the responses of the lamina propria and the vocalis in transverse compression as well as transverse and longitudinal shears are of the same orders of magnitude. We also highlight the strain rate sensitivity of the tissues, as well as their anisotropic properties.
Published: 2020

27. Multi-axial mechanical properties of hydrogel-based materials upon finite strains: towards the design of tailored vocal-fold composite replicas

Author: Hamid Yousefi-Mashouf, Daniel Ferri-Angulo, Lucie Bailly, Jerome Sohier, Laurent Orgéas, Nathalie Henrich Bernardoni, Henrich Bernardoni, Nathalie, De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique - - MicroVoice2017 - ANR-17-CE19-0015 - AAPG2017 - VALID, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), GIPSA - Analyse et Modification de l'homme en mouvement : biomécanique, cognition, vocologie (GIPSA-MOVE), GIPSA Pôle Sciences des Données (GIPSA-PSD), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), MicroVoice - ANR-17-CE19-0015, and ANR-17-CE19-0015,MicroVoice,De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique(2017)
Subjects: multi-axial mechanical loading, finite strain, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], vocal-fold replica, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MAT]Engineering Sciences [physics]/Materials, tunable cross-linked hydrogel
Abstract: International audience; In vitro modeling of phonation requires materials able to mimic the vibro-mechanical features of vocal-fold tissues:ability to (i) endure large deformations under physiological multiaxial loadings and strain rates], (ii) adapt their vibromechanical behavior to external loadings and environmental changes. Among relevant candidates, hydrogels are attractive materials due to their tissue-like water content. However, the mechanical characterization of hydrogels is often limited to single monotonic loadings, mainly in compression, or to standard DMA analyses. These configurations are far from those endured by the tissue in vivo. Here, we manufactured hydrogels with tunable mechanical properties that we characterized under realistic, finite strain, cyclic tension, compression and shear loadings.
Published: 2020

28. Cellulose crystals plastify by localized shear

Author: Karim Mazeau, Laurent Orgéas, Yoshiharu Nishiyama, Pierre J.J. Dumont, David Rodney, Gergely Molnár, Florian Martoïa, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur les Macromolécules Végétales (CERMAV ), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011), and ANR-11-IDEX-0007,Avenir L.S.E.,PROJET AVENIR LYON SAINT-ETIENNE(2011)
Subjects: Dilatant, Materials science, molecular mechanics simulation, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], Metal, Crystal, chemistry.chemical_compound, Engineering, Cellulose, Composite material, Anisotropy, Multidisciplinary, 021001 nanoscience & nanotechnology, crystalline cellulose, Nanostructures, 0104 chemical sciences, nanoscale plasticity, chemistry, Deformation mechanism, Shear (geology), visual_art, Physical Sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, shear bands, 0210 nano-technology, dislocations, Macromolecule
Abstract: Significance While most attention has so far been devoted to the tensile properties of crystalline cellulose, the main elementary building block of plants, we show here using atomistic simulations that their shear is also an important mode of deformation, occurring at stress levels lower than tension with much larger ductility. We also demonstrate how crystalline defects like dislocations drastically facilitate plasticity. This analysis can be used as a basis for the micromechanical modeling of cellulose microfibrils that are currently considered as promising eco-friendly alternatives to synthetic fibers for structural materials., Cellulose microfibrils are the principal structural building blocks of wood and plants. Their crystalline domains provide outstanding mechanical properties. Cellulose microfibrils have thus a remarkable potential as eco-friendly fibrous reinforcements for structural engineered materials. However, the elastoplastic properties of cellulose crystals remain poorly understood. Here, we use atomistic simulations to determine the plastic shear resistance of cellulose crystals and analyze the underpinning atomic deformation mechanisms. In particular, we demonstrate how the complex and adaptable atomic structure of crystalline cellulose controls its anisotropic elastoplastic behavior. For perfect crystals, we show that shear occurs through localized bands along with noticeable dilatancy. Depending on the shear direction, not only noncovalent interactions between cellulose chains but also local deformations, translations, and rotations of the cellulose macromolecules contribute to the response of the crystal. We also reveal the marked effect of crystalline defects like dislocations, which decrease both the yield strength and the dilatancy, in a way analogous to that of metallic crystals.
Published: 2018

29. Permeability of flax fibre mats: Numerical and theoretical prediction from 3D X-ray microtomography images

Author: Pierre J.J. Dumont, Laurent Orgéas, Tarek Abdul Ghafour, Elodie Boller, Nils Audry, Chiara Balbinot, Florian Martoïa, Philippe Vroman, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Génie et Matériaux Textiles (GEMTEX), Ecole nationale supérieure des arts et industries textiles de Roubaix (ENSAIT), and European Synchroton Radiation Facility [Grenoble] (ESRF)
Subjects: Materials science, X-ray microtomography, business.industry, Numerical analysis, Composite number, CT analysis, 02 engineering and technology, Computational fluid dynamics, 021001 nanoscience & nanotechnology, Compression (physics), Microstructure, Permeability, [SPI.MAT]Engineering Sciences [physics]/Materials, 03 medical and health sciences, Permeability (earth sciences), 0302 clinical medicine, Mechanics of Materials, Ceramics and Composites, 030212 general & internal medicine, Composite material, 0210 nano-technology, business, Anisotropy, Natural fibres
Abstract: International audience; Flax fibre mats are promising and versatile biosourced reinforcements that can be used in composite parts obtained using various processing routes. To optimise their impregnation and the end-use properties of composites, it is crucial to better understand the process-induced evolution of their microstructure and their permeability. In this study, flax fibre mats were subjected to in situ X-ray microtomography compression experiments. The resulting 3D images enabled the evolution of several key descriptors of their microstructure under compression to be determined, and the evolution of their permeability to be quantified by direct fibre scale CFD simulations. The microstructural data were also used as input parameters of a modified directional Kozeny-Carman model, accounting for the anisotropy and heterogeneity of mats. Only one unknown directional parameter was identified by inverse method from permeability calculations performed on numerically generated 3D realistic fibre networks. The predictions of the proposed model were consistent with numerical simulations.
Published: 2021

30. Crumpled paper sheets: Low-cost biobased cellular materials for structural applications

Author: Jérémie Viguié, Jean-Francis Bloch, Laurent Orgéas, Pierre J.J. Dumont, Florian Martoïa, Frédéric Flin, Laboratoire Génie des procédés papetiers (LGP2 ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), and Centre Technique du Papier (CTP)
Subjects: Porous microstructure, Yield (engineering), Fabrication, Materials science, [SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph], 02 engineering and technology, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI]Engineering Sciences [physics], 0103 physical sciences, lcsh:TA401-492, General Materials Science, Composite material, 010306 general physics, Porosity, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, Mean curvature, Mechanical Engineering, Polymer, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, Microstructure, chemistry, Mechanics of Materials, Volume fraction, lcsh:Materials of engineering and construction. Mechanics of materials, 0210 nano-technology
Abstract: Several low-density crumpled paper-based materials were fabricated by varying both the volume fraction and the geometry and mechanical properties of paper sheets. Their 3D architecture was investigated using X-ray microtomography. Microstructure descriptors such as the pore size distribution, the mean curvature distribution and the volume fraction of ordered domains were finely analyzed. Their mechanical properties were also assessed using uniaxial compression tests. Our results showed that crumpled materials exhibited a particular porous microstructure with a reproducible mechanical behavior between foams and entangled fibrous materials. Their compressive behavior was characterized by successive elastic, strain-hardening and densification regimes. The effects of the geometry, microstructure and mechanical properties of the sheets on the process-induced microstructures and mechanical performances were discussed. In particular, a simple micromechanical approach was used to estimate analytically and from the 3D images the role of ridges and ordered domains on the mechanical properties of crumpled papers. The evolution of their Young's moduli and yield stresses were studied as a function of their relative densities and compared with experimental data available in the literature for other cellular materials, showing that crumpled papers are promising renewable alternatives to standard polymer foams for several engineering applications, due to the proper combination of mechanical properties, porosity, cost, and easy fabrication. Keywords: Crumpled sheets, Paper, Self-locked architecture, Core materials, Microstructure, Compression behavior, Structural applications, Sandwich panel
Published: 2017

31. 3D in situ observations of the compressibility and pore transport in Sheet Moulding Compounds during the early stages of compression moulding

Author: D. Ferre Sentis, M. Sager, Pierre J.J. Dumont, Pierre Latil, Laurent Orgéas, S. Rolland du Roscoat, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire Génie des procédés papetiers (LGP2 ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Plastic Omnium Auto Exterior (Sigmatech), and Novitom [Grenoble]
Subjects: In situ, Materials science, Composite number, Composite, [SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph], 02 engineering and technology, 010402 general chemistry, 01 natural sciences, [SPI]Engineering Sciences [physics], X-ray microtomographic imagery, Composite material, Elasticity (economics), Porosity, Dissolution, ComputingMilieux_MISCELLANEOUS, Consolidation (soil), [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, 0104 chemical sciences, Pores, Mechanics of Materials, Ceramics and Composites, Compressibility, In situ compression, 0210 nano-technology, Fibre content
Abstract: The properties of Sheet Moulding Compounds (SMCs) are altered by their porosity induced during the manufacturing or moulding of these prepregs. To characterise the pore scale mechanisms occurring during SMC flow, 3D synchrotron X-ray images were acquired during the compression of two uncured SMCs. For the high fibre content SMC ( 50 wt % ), with a high porosity, pores mainly decreased in size and disappeared during SMC consolidation. These mechanisms were related to the elasticity of the fibrous networks and to the permeability of the porous phase, estimated using pore scale CFD simulation. For the standard fibre content SMC ( 29 wt % ), with a lower porosity, the compressibility was limited and closed pores were transported towards the external surface of samples with non-affine motion, i.e., faster than the SMC flow and with tortuous trajectories. Besides, pores coalesced and decreased in size during compression. The size decrease was mainly related to the dissolution of pore gases.
Published: 2017

32. Flow of an elasto-viscoplastic fluid around a flat plate: Experimental and numerical data

Author: Laurent Jossic, Fiacre Ahonguio, Albert Magnin, Frédéric Dufour, Laboratoire Rhéologie et Procédés (LRP), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de rhéologie (LR), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Université Joseph Fourier - Grenoble 1 (UJF), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Jossic, Laurent
Subjects: Physics, Drag coefficient, 010304 chemical physics, Viscoplasticity, Cauchy stress tensor, Applied Mathematics, Mechanical Engineering, General Chemical Engineering, Numerical analysis, [SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Herschel–Bulkley fluid, Mechanics, Stokes flow, Condensed Matter Physics, 01 natural sciences, Finite element method, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], 010305 fluids & plasmas, Physics::Fluid Dynamics, Classical mechanics, Flow (mathematics), 0103 physical sciences, General Materials Science, ComputingMilieux_MISCELLANEOUS
Abstract: This study focuses on the creeping flow of an elasto-viscoplastic fluid around a flat plate moving at a constant velocity. The flow is analyzed both experimentally and numerically. The experiments are performed with a Carbopol gel whose behavior is described by an elasto-viscoplastic model in the numerical analysis. This elasto-viscoplastic model is a 3D Elastic Herschel–Bulkley model implemented in a numerical tool based on the Finite Element Method with Lagrangian Integration Points (FEMLIP). In this model, the yield stress is detected by means of the second invariant of the Cauchy stress tensor and the fluid behaves elastically below the yield stress. The model relies on the understanding of the flow properties especially below the yield stress. After a presentation of the experimental protocol and the numerical method, the numerical and experimental results are compared in terms of kinematic fields and drag coefficients.
Published: 2016

33. Hypervelocity impacts on carbonaceous asteroids analogue materials

Author: Avdellidou, Chrysa, Schultz, Cody, Price, Mark, Di Donna, Alice, Cole, Mike, Harthong, Barthelemy, Delbo, Marco, Britt, Daniel, Peyroux, R., Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Central Florida [Orlando] (UCF), University of Kent [Canterbury], Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), GéoMécanique, Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet)
Subjects: [SDU]Sciences of the Universe [physics], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Regolith simulants, Regolith Physical properties, Regolith formation, impacts
Abstract: International audience; Two on-going sample return space missions, Hayabusa2 and OSIRIS-REx are orbiting and characterising two near-Earth asteroids, (162173) Ryugu and (101955) Bennu respectively. Initial ground-based observations and preliminary mission data indicate that the composition of these small objects is similar to the CM or CI meteorites [1-4]. However, their mechanical properties appear to be different [5,6]. How does this weak materials respond to impacts? What type of regolith is produced during micrometeoroid bombardment? Will we expect to find exogenous materials embedded on the weak surfaces of Bennu and Ryugu?
Published: 2019

34. Mechanical properties of asteroids analog materials

Author: Peyroux, R., Avdellidou, Chrysa, Harthong, Barthelemy, Schultz, Cody, Britt, Daniel, Price, Mark, Cole, Mike, Delbo, Marco, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Central Florida [Orlando] (UCF), and University of Kent [Canterbury]
Subjects: [SDU]Sciences of the Universe [physics], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Regolith simulants, Regolith Physical properties, mechanical test
Abstract: International audience; On-going space missions NASA’s OSIRIS-REx and JAXA’s Hayabusa2 are gathering more and more information on asteroid regolith. In order to better understand how regolith respond to processes occurring in space (particularly micro-meteoroid impacts and thermal cracking), we have developed asteroid analog materials. In the present paper we focus on their mechanical properties deduced from compression and 3 point bending tests.
Published: 2019

35. Mechanical characterization of gelatin-based hydrogels upon finite strains in tension, compression and shear

Author: Hamid Yousefi-Mashouf, Lucie Bailly, Laurent Orgéas, Nathalie Henrich Bernardoni, Sabine Rolland Du Roscoat, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), GIPSA - Voix Systèmes Linguistiques et Dialectologie (GIPSA-VSLD), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire Génie des procédés papetiers (LGP2 ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), and Henrich Bernardoni, Nathalie
Subjects: [SDV.BIO]Life Sciences [q-bio]/Biotechnology, [SPI.MAT] Engineering Sciences [physics]/Materials, [SHS.LANGUE]Humanities and Social Sciences/Linguistics, [SHS.LANGUE] Humanities and Social Sciences/Linguistics, ComputingMilieux_MISCELLANEOUS, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience
Published: 2019

36. Effect of surface morphologies and chemistry of paper on deposited collagen

Author: Kaitlin M. Bratlie, Andrea F. Boyer, Martin M. Thuo, Jean-Francis Bloch, Millicent Orondo, Boyce S. Chang, Anuraag Boddupalli, Iowa State University (ISU), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: General Physics and Astronomy, 02 engineering and technology, Surface finish, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Extracellular matrix, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Fiber, Porosity, Alkyl, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, Silanes, Substrate (chemistry), Surfaces and Interfaces, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Surface energy, 0104 chemical sciences, Surfaces, Coatings and Films, chemistry, Chemical engineering, 0210 nano-technology
Abstract: Paper-based platforms for biological studies have received significant attention given that cellulose is ubiquitous, biocompatible, and can be readily organized into tunable fibrous structures. In the latter form, effect of complexity in surface morphologies (roughness, porosity and fiber organization) on cell-substrate interaction has not been thoroughly explored. We infer that altering the properties of a fibrous material should lead to significant changes in cellular microenvironment and direct the deposition of structurally analogous extracellular matrix (fiber-fiber templating) like collagen. Here, we elucidate the effect of varying paper roughness and surface chemistry on NIH/3T3 fibroblasts via organization of excreted collagen. Collagen intensity was found to increase linearly with paper porosity, indicating a 3D culture platform. The intensity, however, decays over time due to biodegradation of the substrate. Stability can be improved by introducing fluorinated alkyl silanes to yield hydrophobic paper. This process concomitantly transforms the substrate to a 2D-like scaffold where collagen is predominantly assembled on the surface, thus changing the cellular microenvironment. Altering surface energy also led to fluctuations in collagen intensity and organization over time for smooth (calendered) paper substrates. We infer that the increased roughness improves collagen adsorption through capillary driven petal effect. In general, the influence of the substrate simultaneously affects its ability to host collagen and guide orientation. These findings offer insights into the effects of secondary structures and chemistry of fibrous polymeric materials on cell culture, which we propose as vital parameters when using paper-based platforms.
Published: 2019

37. Vocal-fold 3D micro-architecture and micro-mechanics: a multimodal imaging study

Author: Thibaud Cochereau, Hamid Yousefi-Mashouf, Lucie Bailly, Jerome Sohier, Laurent Orgéas, Nathalie Henrich Bernardoni, Sabine Rolland Du Roscoat, Anne Mcleer-Florin, Olivier Guiraud, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), GIPSA - Voix Systèmes Linguistiques et Dialectologie (GIPSA-VSLD), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique UMR 5305 (LBTI), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut d'oncologie/développement Albert Bonniot de Grenoble (INSERM U823), Institut National de la Santé et de la Recherche Médicale (INSERM)-EFS-CHU Grenoble-Université Joseph Fourier - Grenoble 1 (UJF), Novitom [Grenoble], ANR MicroVoice, ANR-17-CE19-0015,MicroVoice,De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique(2017), ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011), Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM), Bailly, Lucie, De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique - - MicroVoice2017 - ANR-17-CE19-0015 - AAPG2017 - VALID, and Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè - - TEC XXI2011 - ANR-11-LABX-0030 - LABX - VALID
Subjects: [SDV.MHEP.AHA] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Histology, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Vocal folds, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Fibres, Synchrotron X-ray imaging, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Biomechanics, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Biphotonic confocal microscopy
Abstract: International audience; Objectives: Current understanding of the histological features of the vocal folds is still insufficient to make the link to their vibromechanical performance. In particular, the 3D microscale rearrangement of the loaded tissues is still to be explored. Thus, the aim of this work is to characterize the 3D histological specificities of human vocal folds' fibrous networks and their straininduced microstructure evolutions under tensile loading, at the scale of the muscular, collagen and elastin microfiber bundles.
Published: 2019

38. Does the Knowledge of the Local Thickness of Human Ascending Thoracic Aneurysm Walls Improve Their Mechanical Analysis?

Author: Cristina Cavinato, Laurent Orgéas, Pierre Badel, Salvatore Campisi, Jérôme Molimard, Nicolas Curt, INSERM U1059, SAINBIOSE - Santé, Ingénierie, Biologie, Saint-Etienne (SAINBIOSE-ENSMSE), Centre Ingénierie et Santé (CIS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), CHU de Saint-Étienne Hôpital Nord (Saint Etienne), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: 0301 basic medicine, Digital image correlation, Materials science, Histology, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, lcsh:Biotechnology, material heterogeneity, Biomedical Engineering, Strain (injury), Bioengineering, 02 engineering and technology, Thoracic aortic aneurysm, Stress (mechanics), 03 medical and health sciences, Aneurysm, sDIC, ascending thoracic aortic aneurysm, local thickness, lcsh:TP248.13-248.65, medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS, Original Research, aortic wall, Bioengineering and Biotechnology, Mechanics, 021001 nanoscience & nanotechnology, medicine.disease, Strength of materials, Aortic wall, 030104 developmental biology, Deformation (engineering), 0210 nano-technology, Biotechnology
Abstract: Ascending thoracic aortic aneurysm (ATAA) ruptures are life threatening phenomena which occur in local weaker regions of the diseased aortic wall. As ATAAs are evolving pathologies, their growth represents a significant local remodeling and degradation of the microstructural architecture and thus their mechanical properties. To address the need for deeper study of ATAAs and their failure, it is required to analyze the mechanical behavior at the sub-millimeter scale by making use of accurate geometrical and kinematical measurements during their deformation. For this purpose, we propose a novel methodology that combined a very accurate tool for thickness distribution measurement of the arterial wall, digital image correlation to assess local strain fields and bulge inflation to characterize the physiological and failure response of flat unruptured human ATAA specimens. The analysis of the heterogeneity of the local thickness and local physiological stress and strain was carried out for each investigated subject. At the subject level, our results state the presence of a non-consistent relationship between the local wall thickness and the local physiological strain field and high heterogeneity of the variables. At the inter-subject level, thicknesses were studied in relation to physiological strain and stress and load at rupture. The rupture pressure was correlated with neither the average thickness nor the lowest thickness of the specimens. Our results confirm that intrinsic material strength (hence structure) differs a lot from a subject to another and even within the same subject.
Published: 2019

39. Influence of the microstructural properties of biocemented sand on its mechanical behavior

Author: Annette Esnault Filet, Christian Geindreau, Fabrice Emeriault, Aurélie Garandet, Abdelali Dadda, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and GéoMécanique
Subjects: 021110 strategic, defence & security studies, Materials science, X-ray microtomography, Mechanics of Materials, [SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique, 0211 other engineering and technologies, Computational Mechanics, General Materials Science, 02 engineering and technology, Composite material, Geotechnical Engineering and Engineering Geology, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering
Abstract: International audience
Published: 2019

40. Multiscale modelling of fibrous and textile materials

Author: Damien Durville, Jean-François Ganghoffer, Stelios Kyriakides, Stepan Vladimirovitch Lomov, Laurent Orgéas, Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Aerospace Engineering and Engineering Mechanics [Austin], and University of Texas at Austin [Austin]
Subjects: Materials science, Textile, Polymer science, business.industry, Applied Mathematics, Mechanical Engineering, [SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph], 02 engineering and technology, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, Condensed Matter Physics, [SPI]Engineering Sciences [physics], 020401 chemical engineering, Mechanics of Materials, Modeling and Simulation, General Materials Science, 0204 chemical engineering, 0210 nano-technology, business, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018

41. Développement et optimisation d'endoprothèses vasculaires: architectures optimisées et biomimétiques

Author: Ott, Franck, Boucard, Nadège, Geindreau, Christian, Bailly, Lucie, Orgéas, Laurent, MDB Texinov (MDB Texinov), MDB Texinov, Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Bailly, Lucie
Subjects: X-ray microtomography, Vascular biomechanics, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.MSMECA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph], Mechanical testing, [SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph], Endoprothesis, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], synchrotron ESRF, ComputingMilieux_MISCELLANEOUS, Abdominal Aorta Aneurysm, Permeability
Abstract: International audience
Published: 2018

42. Caractérisation expérimentale multi-échelle et interdisciplinaire des plis vocaux

Author: Fabrice Silva, Lucie Bailly, Philippe Chaffanjon, Nathalie Henrich Bernardoni, Antoine Giovanni, Aude Lagier, Xavier Laval, Thierry Legou, Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Matériaux et Structures (M&S), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire d'Anatomie des Alpes Françaises (LADAF), CHU Grenoble, GIPSA - Voix Systèmes Linguistiques et Dialectologie (GIPSA-VSLD), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), ORL et Chirurgie cervico-faciale pédiatrique - [Hôpitaux Timone et Nord - APHM], Hôpital de la Timone [CHU - APHM] (TIMONE)-Aix Marseille Université (AMU)- Hôpital Nord [CHU - APHM]-Assistance Publique - Hôpitaux de Marseille (APHM), Centre Hospitalier Universitaire de Liège (CHU-Liège), GIPSA-Services (GIPSA-Services), Laboratoire Parole et Langage (LPL), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Défi Mécanobiologie de la Mission pour l'Interdisciplinarité du CNRS, VOCEM, ANR-17-CE19-0015,MicroVoice,De la microstructure fibreuse du tissu vocal à la biomécanique phonatoire : conception d'un nouvel oscillateur biomimétique(2017), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)- Hôpital de la Timone [CHU - APHM] (TIMONE)- Hôpital Nord [CHU - APHM]
Subjects: [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract: National audience
Published: 2018

43. Upscaling of Diffusion–Reaction Phenomena by Homogenisation Technique: Possible Appearance of Morphogenesis

Author: Jean-Louis Auriault, Jean-Francis Bloch, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: Physics, Work (thermodynamics), Scale (ratio), General Chemical Engineering, 0208 environmental biotechnology, 02 engineering and technology, [PHYS.MECA]Physics [physics]/Mechanics [physics], 010502 geochemistry & geophysics, Thermal diffusivity, 01 natural sciences, Catalysis, Domain (mathematical analysis), 020801 environmental engineering, Orders of magnitude (time), Statistical physics, Diffusion (business), Porous medium, Order of magnitude, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract: The main objective of this work is to describe reaction–diffusion of two species in a porous medium. We aim at finding the macroscopic model equivalent to the description of the physics at the pore scale, with a peculiar attention to possible shape morphogenesis as introduced in Turing’s seminal article in 1952 (Turing in Philos Trans R Soc Lond Ser B 237:37, 1952). The upscaling process makes use of the method of asymptotic expansions which takes advantage of the presence of the small parameter of separation of scales $$\varepsilon = l/L$$ , where l and L are the characteristic sizes of the pores and the sample or the diffusion wavelength, respectively. Two different situations are investigated here: large reaction–diffusion and large diffusivity ratios. Among all possibilities, we investigate three orders of magnitude of the reaction terms and two orders of magnitude of the diffusivity ratio. In each of the situations, we demonstrate, if it exists, the macroscopic equivalent model at a scale $$L \gg l$$ , at the first order of approximation. Hence, we obtain a catalogue of macroscopic models for each considered case, their domain of validity, and the expression of the macroscopic properties. We underline the adequate conditions to account for the appearance of morphogenesis.
Published: 2018

44. Manufacturing of starch-based materials using ultrasonic compression moulding (UCM): toward a structural application

Author: Jean-Luc Putaux, Pierre J.J. Dumont, Didier Imbault, Maxime Teil, Barthélémy Harthong, Arnaud Regazzi, Robert Peyroux, Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire Génie des procédés papetiers (LGP2), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur les Macromolécules Végétales (CERMAV), and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: 0301 basic medicine, Materials science, Softwood, Starch, Composite number, Modulus, Bending, Starch granules, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Flexural strength, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, lcsh:Social sciences (General), Composite material, Ultrasonic moulding, lcsh:Science (General), chemistry.chemical_classification, Multidisciplinary, Polymer, Compression (physics), 030104 developmental biology, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Biobased composites, lcsh:H1-99, 030217 neurology & neurosurgery, Research Article, Wood fibres, lcsh:Q1-390
Abstract: An experimental study of the ultrasonic compression moulding (UCM) to manufacture biobased composites made of semicrystalline starch powders and softwood fibres is described. The main objective was to assess the potential of using this fast and economical processing technique to elaborate a 100% biobased composite which might substitute more usual polymer materials for structural applications. The starch powder was chosen as raw material for the matrix while the reinforcement was made of softwood fibres. Tablets made of starch only and composite beams were processed under different conditions and characterised by several techniques. Three types of starch powders and two types of fibres were used as raw materials. A morphological and crystalline analysis was carried out by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The native semicrystalline structure of starch granules was not totally preserved so as to obtain a homogeneous material. Diametral compression tests on tablets were performed to improve the processing route and obtain the materials with the best properties. Bending tests were used on composite beams to quantify the mechanical properties and study the effects of the processing parameters. The optimum processing parameters were defined and allowed obtaining a matrix for which the flexural strength reached 21 MPa. Mechanical properties were improved when fibres were added into the matrix: three-points bending tests showed a Young's modulus of 6 GPa, a flexural strength of 75 MPa and a flexural strain at break of 6% for a bulk density of 1.25. Considering these results, UCM appears to be a promising process to design a 100% biobased composite with mechanical properties comparable to those of classical discontinuous fibre composites., Ultrasonic moulding; Biobased composites; Starch granules; Wood fibres
Published: 2021

45. Modelling rainfall-induced mudflows using FEMLIP and a unified hydro-elasto-plastic model with solid-fluid transition

Author: Félix Darve, Frédéric Dufour, Z.H. Li, Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), GéoMécanique, and Sibille, Luc
Subjects: Engineering, Environmental Engineering, Water flow, Effective stress, 0211 other engineering and technologies, 02 engineering and technology, 010502 geochemistry & geophysics, 01 natural sciences, Physics::Geophysics, symbols.namesake, [SPI.GCIV.GEOTECH] Engineering Sciences [physics]/Civil Engineering/Géotechnique, [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, Geotechnical engineering, [SPI.GCIV.RISQ] Engineering Sciences [physics]/Civil Engineering/Risques, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Civil and Structural Engineering, business.industry, [SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique, Elasto plastic, Mechanics, [SPI.GCIV.CH]Engineering Sciences [physics]/Civil Engineering/Construction hydraulique, 6. Clean water, Finite element method, Permeability (earth sciences), Continuity equation, Mudflow, symbols, [SPI.GCIV.CH] Engineering Sciences [physics]/Civil Engineering/Construction hydraulique, business, Lagrangian
Abstract: The paper describes a proposed unified hydro-elasto-plastic model with a solid–fluid transition. The model associates a hydro-elasto-plastic model for partially saturated geomaterials, a Bingham’s viscous law, and the transition criterion between solid and fluid states. The model describes both solid and fluid behaviours of partially saturated geomaterials in a unified framework. In addition, this paper describes a novel Finite Element Method with Lagrangian Integration Points (FEMLIP) formulation for solving hydro-mechanical problems. Based on the equilibrium equation of momentum and the continuity equation of water flow, the formulation was developed and implemented in a FEMLIP tool. Bishop’s effective stress expression and proper water retention diagrams were taken into account. A heuristic column and real rainfall-induced mudflows were also simulated and analysed in this study. The permeability effects of partially saturated soil and the effective cohesion were considered, which included consideration...
Published: 2016

46. 3D synchrotron X-ray microtomography for paper structure characterization of z-structured paper by introducing micro nanofibrillated cellulose

Author: Patrice Patrice, Jean-Francis Bloch, Boller Elodie, Mohamed Ali Charfeddine, Université du Québec à Trois-Rivières (UQTR), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and European Synchrotron Radiation Facility (ESRF)
Subjects: Paper structure, Synchrotron X-ray microtomography, X-ray microtomography, Materials science, 02 engineering and technology, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, chemistry.chemical_compound, law, 0202 electrical engineering, electronic engineering, information engineering, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, General Materials Science, Cellulose, Composite material, Porosity, Forestry, 021001 nanoscience & nanotechnology, Synchrotron, Characterization (materials science), Calcium carbonate, chemistry, Micro Nano Fibrillated Cellulose, 020201 artificial intelligence & image processing, Post treatment, 0210 nano-technology, Layer (electronics), 3D
Abstract: International audience; A layer of Micro Nanofibrillated Cellulose (MNFC) was added during the formation of TMP paper to create a z-structured paper. A MNFC layer was added either on the top or in the middle of the thickness of a TMP sheet using a Dynamic Sheet Former. The MNFC layer basis weight was varied from 2 to 20 g.m-2 for a final paper basis weight of 60 g.m-2. 3D images of the paper structure were obtained by Synchrotron X-ray microtomography, showing that localized MNFC fibrils were retained in the paper structure. The small dimensions of CNF, particularly in width, and the presence of the calcium carbonate in the MNFC layer permit to clearly differentiate the TMP fibers from the MNFC fibrils. The porosity profiles for 100% TMP sheet and 100% MNFC film present a constant internal bulk porosity at about 75% and 38%, respectively. Porosity profiles of the z-structured paper display the presence of 2 or 3 different porosity zones in the internal bulk region. These results confirm the possibility to design papers with targeted porosity gradients in the z-direction without paper post treatment.
Published: 2016

47. A Method to Measure Moisture Induced Swelling Properties of a Single Wood Cell

Author: Pierre J.J. Dumont, Thomas Joffre, Per Isaksson, E. K. Gamstedt, Simon Sticko, Laurent Orgéas, S. Rolland du Roscoat, Uppsala Universitet [Uppsala], Angström Laboratory, Uppsala University, Laboratoire Génie des procédés papetiers (LGP2 ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: Moisture content, Materials science, Aerospace Engineering, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Hygroexpansion, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI]Engineering Sciences [physics], FE simulation, medicine, Relative humidity, Fiber, Composite material, Water content, ComputingMilieux_MISCELLANEOUS, Moisture, Mechanical Engineering, Stiffness, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], 021001 nanoscience & nanotechnology, 0104 chemical sciences, X-ray microtomography, Mechanics of Materials, Solid mechanics, Engineered wood, Wood fiber, medicine.symptom, Swelling, 0210 nano-technology
Abstract: Wood cells constitute the main building block in engineered wood-based materials, whose delimiting property frequently is moisture induced swelling. The hygroexpansion properties of wood cells, technically known as fibers, are used as input in predictive micromechanical models aimed for materials design. Values presented in the literature largely depend on the microfibrillar angle, the geometry of the fiber and limiting modelling assumptions. Synchrotron X-ray micro-computed tomography has recently prompted means for detailed measurements of the geometry of unconstrained individual fibers undergoing moisture-induced swelling, which makes it possible to directly quantify the hygroexpansion properties of the cell wall. In addition to a well-defined three-dimensional geometry, the present approach also accounts for large deformations and the fact that cell-wall stiffness depends on the presence of moisture. A mixed numerical-experimental approach is adopted where a finite-element updating scheme is used to simulate the swelling of an earlywood spruce fiber going from the experimental fiber geometry at 47 % relative humidity to the predicted geometry of the fiber in the wet state at 80 % relative humidity at equilibrium conditions. The hygroexpansion coefficients are identified by comparing the predicted and the experimental three-dimensional fiber geometry in the wet state. The obtained values are 0.17 strain per change in relative humidity transverse to the microfibrils in the cell wall, and 0.014 along the microfibrils.
Published: 2016

48. Recruiting physisorbed water in surface polymerization for bio-inspired materials of tunable hydrophobicity

Author: Boyce S. Chang, Ian D. Tevis, Jiahao Chen, Stephanie Oyola-Reynoso, Simge Çınar, Martin M. Thuo, Jean-Francis Bloch, Iowa State University (ISU), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Ames Laboratory [Ames, USA], Iowa State University (ISU)-U.S. Department of Energy [Washington] (DOE), Laboratoire Génie des procédés papetiers (LGP2 ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Renewable Energy, Sustainability and the Environment, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, [PHYS.MECA]Physics [physics]/Mechanics [physics], 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Surface energy, [SPI.MAT]Engineering Sciences [physics]/Materials, 0104 chemical sciences, Accessible surface area, Contact angle, Surface tension, Polymerization, Chemical engineering, Polymer chemistry, Surface modification, Bound water, General Materials Science, Wetting, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; Chemical grafting has been widely used to modify the surface properties of materials, especially surface energy for controlled wetting, because of the resilience of such coatings/modifications. Reagents with multiple reactive sites have been used with the expectation that a monolayer will form. The step-growth polymerization mechanism, however, suggests the possibility of gel formation for hydrolyzable moieties in the presence of physisorbed water. In this report, we demonstrated that using alkyltrichlorosilanes (trivalent [i.e., 3 reactive sites]) in the surface modification of a cellulosic material (paper) does not yield a monolayer but rather gives surface-bound particles. We infer that the presence of physisorbed (surface-bound) water allows for polymerization (or oligomerization) of the silane prior to its attachment on the surface. Surface energy mismatch between the hydrophobic tails of the growing polymer and any unreacted bound water leads to the assembly of the polymerizing material into spherical particles to minimize surface tension. By varying paper grammage (16.2–201.4 g m À2), we varied the accessible surface area and thus the amount of surface-adsorbed water, allowing us to control the ratio of the silane to the bound water. Using this approach, polymeric particles were formed on the surface of cellulose fibers ranging from $70 nm to a film. The hydrophobicity of the surface, as determined by water contact angles, correlates with particle sizes (p < 0.001, Student's t-test), and, hence, the hydrophobicity can be tuned (contact angle between 94 and 149). Using a model structure of a house, we demonstrated that as a result of this modification, paper-based houses can be rendered self-cleaning or tolerant to surface running water. In another application, we demonstrated that the felicitous choice of architectural design allows for the hydrophobic paper to be used for water harvesting.
Published: 2016

49. Surface polymerization of perfluorosilane treatments on paper mitigates HF production upon incineration

Author: Stephanie Oyola-Reynoso, Jiahao Chen, Boyce S. Chang, Jean-Francis Bloch, Martin M. Thuo, Iowa State University (ISU), Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: Chemistry, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, General Chemical Engineering, Thermal decomposition, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Silane, [SPI.MAT]Engineering Sciences [physics]/Materials, 0104 chemical sciences, Incineration, [SPI]Engineering Sciences [physics], chemistry.chemical_compound, Residue (chemistry), Chemical engineering, Polymerization, Reagent, Organic chemistry, 0210 nano-technology
Abstract: International audience; Hydrophobic paper has inspired advances in low-cost technologies.Of importance is the use of perfluorinated reagents, due to suspectedrelease of HF. Surprisingly, by using a coupled TGA-IR-MS, wedemonstrate that polymerization of a perfluorinated silane on paper,leads to rapid degradation, low-ash residue, and no toxic HF gas isproduced under thermolysis.
Published: 2016

50. Reprint of 'Draw your assay: Fabrication of low-cost paper-based diagnostic and multi-well test zones by drawing on a paper'

Author: Stephanie Oyola-Reynoso, Andrew P. Heim, Julian Halbertsma-Black, C. Zhao, Ian D. Tevis, Simge Çınar, Rebecca Cademartiri, Xinyu Liu, Jean-Francis Bloch, Martin M. Thuo, Iowa State University (ISU), University of Massachusetts System (UMASS), Kenyatta University of Nairobi (KU), Department of Mechanical Engineering [Montréal], McGill University = Université McGill [Montréal, Canada], Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Mécanique et Couplages Multiphysiques des Milieux Hétérogènes (CoMHet), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI]Engineering Sciences [physics], [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Analytical Chemistry
Abstract: Interest in low-cost diagnostic devices has recently gained attention, in part due to the rising cost of healthcare and the need to serve populations in resource-limited settings. A major challenge in the development of such devices is the need for hydrophobic barriers to contain polar bio-fluid analytes. Key approaches in lowering the cost in diagnostics have centered on (i) development of low-cost fabrication techniques/processes, (ii) use of affordable materials, or, (iii) minimizing the need for high-tech tools. This communication describes a simple, low-cost, adaptable, and portable method for patterning paper and subsequent use of the patterned paper in diagnostic tests. Our approach generates hydrophobic regions using a ball-point pen filled with a hydrophobizing molecule suspended in a solvent carrier. An empty ball-point pen was filled with a solution of trichloro perfluoroalkyl silane in hexanes (or hexadecane), and the pen used to draw lines on Whatman® chromatography 1 paper. The drawn regions defined the test zones since the trichloro silane reacts with the paper to give a hydrophobic barrier. The formation of the hydrophobic barriers is reaction kinetic and diffusion-limited, ensuring well defined narrow barriers. We performed colorimetric glucose assays and enzyme-linked immuno-sorbent assay (ELISA) using the created test zones. To demonstrate the versatility of this approach, we fabricated multiple devices on a single piece of paper and demonstrated the reproducibility of assays on these devices. The overall cost of devices fabricated by drawing are relatively lower (US $0.001 per device) than those derived from wax-printing (US$0.05-0.003) or other approaches.
Published: 2015

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