6 results on '"Gailhac, Claude"'
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2. Optimisation of ballistic protection systems based on impact test/simulation correlation
- Author
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Cosquer Yohan, Longère Patrice, Pantalé Olivier, and Gailhac Claude
- Subjects
Physics ,QC1-999 - Abstract
The complexity of ballistic protections increases with their efficiency. On this basis, an exclusively empirical approach is not adapted to optimise complex protection systems and the resort to numerical simulations is preferred if not mandatory. The present study proposes a methodology aiming at optimising complex multi-layer ballistic armours based on an experimental-numerical correlation. A multi-layer system is taken as example. A numerical model is first calibrated according to impact-on-monolithic-target test results. Once the model is validated, an optimisation process considering multi-layer configurations involving a sharp-nosed threat modifies the plates’ thicknesses in order to minimise the total mass while ensuring the system’s protective capacity in terms of residual velocity. The optimisation process shows that a single layer system is more efficient than a multi-layer one in the studied case.
- Published
- 2021
- Full Text
- View/download PDF
3. Investigation of the ballistic performance of multi-material protection systems
- Author
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Cosquer, Yohan, Longère, Patrice, Pantalé, Olivier, Gailhac, Claude, DGA - Techniques aéronautiques, Direction générale de l'Armement (DGA), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire Génie de Production (LGP), Ecole Nationale d'Ingénieurs de Tarbes (ENIT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT), and Constructions industrielles de la méditerranée (CNIM)
- Subjects
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] - Abstract
International audience; Ballistic protections usually result from an incremental and empirical approach and accordingly strongly depend on the experience and know-how of the manufacturer. Yet, in order to improve their specific ballistic resistance, current ballistic protections are more and more complex, based on functional, multi-layer and multi-material systems, and thus require the optimisation of a great number of parameters (e.g. layering order, thicknesses, number of layers, etc). In this context, numerical simulation-aided design has become indispensable. An engineering ballistics-oriented methodology based on the correlation between experiments and simulations is under development. It has proven efficient for bi-layer protection systems, see Cosquer et al. (2021), and still needs to be applied to more complex configurations. In this aim in view, an experimental campaign has been conducted on multi-material protection systems consisted of assemblies of plates made of ceramic, metal or/and fiber reinforced polymer fabric, each material having its own function in the protection system. In the framework of a calibration and V&V approach, impact tests were carried out employing ICA STIMPACT impact facility (3 gas launchers and their high-speed diagnostics) onceramic/metal, metal/fabric and ceramic/metal/fabric protection systems. The interaction between the projectile and the protection systems was video-recorded using high-speed cameras, and residual velocity vs impact velocity curves were plotted for estimating the ballistic limit for each configuration. A first attempt of numerically reproducing the experimental results was then made employing the finite element computation code Abaqus-Exp and using the engineering nonlinear constitutive models implemented by default in it. Experimental results will be presented and commented and the limitations of the numerical simulations and ways of improvement will be discussed.
- Published
- 2022
4. Methodology to optimise ballistic protection systems based on an experiment/simulation correlation
- Author
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Cosquer, Yohan, Longère, Patrice, Pantalé, Olivier, Gailhac, Claude, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire Génie de Production (LGP), Ecole Nationale d'Ingénieurs de Tarbes (ENIT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT), and Constructions industrielles de la méditerranée (CNIM)
- Subjects
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] - Abstract
International audience
- Published
- 2022
5. Identification of armour technological solutions following experiment-simulation correlation
- Author
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Cosquer, Yohan, Longère, Patrice, Pantalé, Olivier, Gailhac, Claude, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire Génie de Production (LGP), Ecole Nationale d'Ingénieurs de Tarbes (ENIT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT), and Constructions industrielles de la méditerranée (CNIM)
- Subjects
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] - Abstract
International audience
- Published
- 2022
6. Optimisation of ballistic protection systems based on impact test/simulation correlation.
- Author
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Gálvez Díaz-Rubio, F., Cendón Franco, D. A., Cosquer, Yohan, Longère, Patrice, Pantalé, Olivier, and Gailhac, Claude
- Subjects
BALLISTICS ,VELOCITY ,STATISTICAL correlation ,COMPUTER simulation ,CALIBRATION - Abstract
The complexity of ballistic protections increases with their efficiency. On this basis, an exclusively empirical approach is not adapted to optimise complex protection systems and the resort to numerical simulations is preferred if not mandatory. The present study proposes a methodology aiming at optimising complex multi-layer ballistic armours based on an experimental-numerical correlation. A multi-layer system is taken as example. A numerical model is first calibrated according to impact-on-monolithic-target test results. Once the model is validated, an optimisation process considering multi-layer configurations involving a sharp-nosed threat modifies the plates' thicknesses in order to minimise the total mass while ensuring the system's protective capacity in terms of residual velocity. The optimisation process shows that a single layer system is more efficient than a multi-layer one in the studied case. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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