Multiscale approach for granular materials including an intermediate scale

François Nicot (1) , F. Darve (2)

1 UR ETGR (ETNA) - Érosion torrentielle, neige et avalanches
2 3SR - Laboratoire sols, solides, structures - risques [Grenoble]

This paper proposes an advanced micromechanical model that introduces an intermediate scale (mesoscopic scale): elementary hexagonal patterns of adjoining particles. This is a breakthrough with respect to current micromechanical models that generally describe the material by a single distribution of contacts. In essence, such models can incorporate a variety of local physical mechanisms. In this paper, the occurrence of diffuse failure is investigated, and the existence of a broad bifurcation domain inside the plastic limit surface is verified.

Mots clés: MODELE; RUPTURE; DIFFUSION; MICROMECANIQUE; BIFURCATION

Domaines: Sciences de l'environnement

François Nicot, F. Darve. Multiscale approach for granular materials including an intermediate scale. Second International Symposium on Computational Geomechanics (ComGeo II), Apr 2011, Cavtat-Dubrovnik, France. 8 p. ⟨hal-00622169⟩