A micromechanical inspired model for the coupled to damage elasto-plastic behavior of geomaterials under compression

Jean-Jacques Marigo (1) , Kyrylo Kazymyrenko (2)

1 LMS - Laboratoire de mécanique des solides
2 LAMSID - UMR 8193 - Laboratoire de Mécanique des Structures Industrielles Durables

We propose an elasto-plastic model coupled with damage for the behavior of geomaterials in compression. The model is based on the properties, shown in [2], of micro-cracked materials when the micro-cracks are closed with a friction between their lips. That leads to a macroscopic model coupling damage and plasticity where the plasticity yield criterion is of the Drucker-Prager type with kinematical hardening. Adopting an associative flow rule for the plasticity and a standard energetic criterion for damage, the properties of such a model are illustrated in a triaxial test with a fixed confining pressure.

Keywords: Plasticity; Damage; compression test; geomaterials; dilatancy

Domains: Solid mechanics [physics.class-ph]

Jean-Jacques Marigo, Kyrylo Kazymyrenko. A micromechanical inspired model for the coupled to damage elasto-plastic behavior of geomaterials under compression. Mechanics & Industry, In press. ⟨hal-02043665⟩