Anisotropic damage model with unilateral effect and sliding friction for brittle materials

Abdelkibir Benelfellah (1) , Arnaud Frachon (1) , Michel Gratton (1) , Michael Caliez (1) , Didier Picart (2)

1 LMR - Laboratoire de Mécanique et de Rhéologie
2 CEA Le Ripault - CEA Le Ripault

The opening-closing effect of the microcracks is a kinematic phenomenon usually modeled using a set of damage variables. The influence of microcracks must be taken into account depending on their opening or closing state, which results in different elasticity for the same level of damage. In this work, the volumetric, deviatoric and tangential model denoted as V-D-T is chosen and modified by introducing the opening-closing effect into the free energy. This model is coupled with a sliding-friction mechanism of the microcrack lips when the latter are closed. Simulations of compression tests with confinements are presented to validate the model.

Mots clés: Anisotropic damage; Microcracking; Degradation; Induced anisotropy; Constitutive modeling; microplane model

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

Abdelkibir Benelfellah, Arnaud Frachon, Michel Gratton, Michael Caliez, Didier Picart. Anisotropic damage model with unilateral effect and sliding friction for brittle materials. 5th International Congress on Design and Modelling of Mechanical Systems, 2013, Djerba, Tunisia. ⟨10.1007/978-3-642-37143-1_51⟩. ⟨hal-01741455⟩