Brittle damage in initially anisotropic materials: a model accounting for the induced anisotropy and unilateral effects

Hélène Welemane (1) , Cristina Goidescu (1) , Djimédo Kondo (2) , Olivier Pantalé (1) , Moussa Karama (1)

1 LGP - Laboratoire Génie de Production
2 DALEMBERT - Institut Jean Le Rond d'Alembert

A new micromechanical modelling approach for brittle damage in initially orthotropic materials is presented. The proposed strain-based energy formulation allows to derive a fully anisotropic multilinear model for microcracked materials with arbitrary oriented defects. The thermodynamics framework provides a standard procedure for the damage evolution law. The new model explicitly accounts for the interaction between primary and induced anisotropies. Moreover, the very challenging issue of opening-closure effects (unilateral behavior) is addressed in this framework.

Mots clés: Brittle damage; Micromechanical model; Initial anisotropy; Induced anisotropy; Unilateral effect

Domaines: Mécanique des matériaux [physics.class-ph]

Hélène Welemane, Cristina Goidescu, Djimédo Kondo, Olivier Pantalé, Moussa Karama. Brittle damage in initially anisotropic materials: a model accounting for the induced anisotropy and unilateral effects. Applied Mechanics and Materials, 2015, vol. 784, pp. 173-178. ⟨10.4028/www.scientific.net/AMM.784.173⟩. ⟨hal-01212114⟩