Shear flow of sphere packings in the geometric limit

Pierre-Emmanuel Peyneau (1) , Jean-Noël Roux (1)

1 navier umr 8205 - Laboratoire Navier

We investigate the behavior of a model granular material made of frictionless, nearly rigid equal-sized beads, in the quasistatic limit, by numerical simulation. In the macroscopic geometric limit (that is the macroscopic, rigid and quasistatic limits), with either volume or normal stress controlled simulations, static and dynamic macroscopic friction coefficients coincide, dilatancy vanishes and the material satisfies a Lade-Duncan failure criterion. The macroscopic shear strength stems from both contact network and force anisotropy.

Mots clés: Granular materials; Shear flow; Critical state

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

Pierre-Emmanuel Peyneau, Jean-Noël Roux. Shear flow of sphere packings in the geometric limit. The XVth International Congress on Rheology (The Society of Rheology 80th Annual Meeting), Aug 2008, Monterey, United States. pp.947-949, ⟨10.1063/1.2964904⟩. ⟨hal-00531796⟩