ABSTRACT
It is well-known that various features of rocks behavior cannot be satisfactorily understood and explained without reference to their porosity (see for instance (Li et al. 2009)). Homogenization theory constitutes a relevant way to incorporate the effects of such pores in the materials non linear mechanical behavior. As an example, Gurson model (Gurson 1977) allows to study voids growth process in engineering materials whose matrix obeys to a von Mises plasticity law. Despite its interest, the Gurson model fails to be applicable to geomaterials for which the solid matrix generally exhibits a plastic compressibility.
