The modeling and simulation activities are oriented towards understanding and predicting, across the carbon- and ceramic-matrix composites length scales, their behavior under diverse applied loads (mechanical, thermal and chemical) and to establish relationships between processing, (micro-)structure and effective properties, through multi-scale* and multi-physics** computations.
The developed models and the associated numerical simulations are based on realistic representations of the materials at several length scales, especially « image-based » approaches. Several numerical strategies are used, depending on the considered scales and mechanisms. The final goal is to favor, through the use of process and/or behavior modeling, an optimal utilization of these composite materials, and even to propose improvements on their architecture and constituents and processing routes.
* The scales at which these materials are studied are from bottom to top : the single filament, the microcomposite, the minicomposite and finally the whole composite with multidirectional woven reinforcement.
** Thermal transfer, mechanics, oxidation/corrosion chemistry, either coupled or separate.
Team
Animator
Guillaume COUEGNAT
Members
G CAMUS
O CATY
C DESCAMPS
B DUBROCA
A EBEL
J GALY
E MARTIN
F REBILLAT
J ROGER
G VIGNOLES
Significant publications :
Bellezza, G.; Couégnat, G.; Ricchiuto, M. ; Vignoles, G. L. (2022) A 2D image-based multiphysics model for lifetime evaluation and failure scenario analysis of self-healing ceramic-matrix mini-composites under a tensile load. Journal of the European Ceramic Society, 6391-6403.
Charles, C.; Vignoles, G. L.; Descamps, C. (2022) Low pressure gas transfer in fibrous media with progressive infiltration: correlation between different transfer modes. International Journal of Heat and Mass Transfer, 121954.
Leyssale, J.-M. ; Couégnat, G. ; Jouannigot, S. ; Vignoles, G. L. (2022) Mechanisms of elastic softening in highly anisotropic carbons under in-plane compression/indentation. Carbon, 425-434.
Vignoles, G.L.; Talué, G.; Badey, Q.; Guette, A.; Pailler, R.; Le Petitcorps, Y.; Maillé, L. (2022) Chemical Supercritical Fluid Infiltration of Pyrocarbon with Thermal Gradients: Deposition Kinetics and Multiphysics Modeling. Journal of Composites Science, 20 (20 p.).
Essongue, S.; Couégnat, G.; Martin, E. (2021) Performance assessment of the augmented finite element method for the modelling of weak discontinuities. International Journal for Numerical Methods in Engineering, 172-189.
Essongue, S., Couégnat, G., & Martin, E. (2021). Finite element modelling of traction-free cracks: Benchmarking the augmented finite element method (AFEM). Eng. Fract. Mech., 253, 107873.
Essongue, S., Couégnat, G., & Martin, E. (2021). Performance assessment of the augmented finite element method for the modelling of weak discontinuities. Int J Numer Methods Eng, 122(1), 172–189.
Jayet, T. – D., Baranger, E., Couégnat, G., & Denneulin, S. (2021). Feasibility of a weakly intrusive Generalized Finite Element Method implementation in a commercial code: Application to Ceramic Matrix Composite micro-structures. Computers & Structures, 242, 106374.
Vignoles, G. L., Rochais, D., & Chupin, S. (2021). Computation of the conducto-radiative effective heat conductivity of porous media defined by Triply Periodic Minimal Surfaces. Int. J. Therm. Sci., 159, 106598.
Vignoles, G. L., Talué, G., Badey, Q., Guette, A., Pailler, R., Le Petitcorps, Y. & Maillé, L. (2022). Chemical Supercritical Fluid Infiltration of Pyrocarbon with Thermal Gradients: Deposition Kinetics and Multiphysics Modeling. J. Compos. Sci., 6(1), 20 (20 p.).