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Your search keyword '"Besnard, Gilles"' showing total 3 results
Start Over Author "Besnard, Gilles" Topic [phys.meca.mema]physics [physics]/mechanics [physics]/mechanics of materials [physics.class-ph]
3 results on '"Besnard, Gilles"'

1. On the use of imaging and kinematic field measurements for the study of the dynamic behavior of materials

Author

Hild, François, Besnard, Gilles, Pattofatto, Stephane, Roux, Stephane, Zhao, Han, Laboratoire de Mécanique et Technologie (LMT), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), and École normale supérieure - Cachan (ENS Cachan)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

2. De l’apport des mesures de champs cinématiques pour l’analyse du comportement dynamique des matériaux

Author

Hild, François, Besnard, Gilles, Lagrange, J.M., Pattofatto, Stephane, Roux, Stéphane, Zhao, Han, Laboratoire de Mécanique et Technologie (LMT), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

3. Characterization of necking phenomena in high speed experiments by using a single camera

Author

Besnard, Gilles, Lagrange, Jean-Michel, Hild, François, Roux, Stéphane, Voltz, Christophe, Laboratoire de Mécanique et Technologie (LMT), École normale supérieure - Cachan (ENS Cachan)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), VALDUC (DAM/VALDUC), and CEA-DAM

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Ultra high speed camera, Detonics, Stereovision, Necking
Abstract

International audience; The purpose of the experiment described herein is the study of material deformation (here a cylinder) induced by explosives. During its expansion, the cylinder (initially 3 mm thick) is thinning until fracture appears. Some tens of microseconds before destruction, strain localizations occur and induce mechanical necking. To characterize the time of first localizations, 25 stereoscopic acquisitions at about 500,000 frames per second are used by resorting to a single ultra-high speed camera. The 3D reconstruction from stereoscopic movies is described. A special calibration procedure is followed, namely, the calibration target is imaged during the experiment itself. To characterize the performance of the present procedure, resolution and optical distortions are estimated. The principle of stereoscopic reconstruction of an object subjected to a high speed experiment is then developed. This reconstruction is achieved by using a global image correlation code that exploits random markings on the object outer surface. The spatial resolution of the estimated surface is evaluated thanks to a realistic image pair synthesis. Last, the time evolution of surface roughness is estimated. It gives access to the onset of necking.

Published
2010

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