Représentation à l'échelle microscopique d'un mécanisme de rupture dans un milieu a joints

. A representation of a class of failure mechanisms defined on a homogenized jointed medium by a velocity jump along a planar surface, is analyzed at the scale of the joints. The approach consists in representing a velocity jump at the macroscopic level by the kinematics of a finite band in the heterogeneous medium characterized by a piecewise rigid body motion of elementary blocs. The equivalence (in the sense of the yield design theory) between the macroscopic and macroscopic representations of such failure mechanisms is ensured by the equality of the corresponding maximum resisting rates of work. To cite this article: S. Maghous et al., C. R. Mecanique 333 (2005).