Hyperelastic or Hypoelastic Granular Circular Chain Instability in a Geometrically Exact Framework (original) (raw)

Interface behavior of granular materials: discrete numerical simulation of a ring simple shear test

The paper aims at analyzing the interface behavior of granular material with a particular interest on the grain size distribution and the contact law (linear or non-linear elastic). The effect of these parameters on the initial state (density and arrangement) and the global behavior is studied by the simulation of a ring simple shear test using the Discrete Element Method and compared with theoretical developments. The global behavior characterized by the initial shear modulus is compared with the results of an homogenization approach explicitly accounting for the particle size distribution and the linear or non linear elasticity of the contact law.

Force chains in sheared granular media of irregular particles

2000

We study topological and dynamical properties in sheared granular media particularly when avalanches occur, i.e. at the abrupt increase of the total kinetic energy durin g the shear process. Our model considers irregular polygonal particles compressed between two moving plates. At the occurrence of an avalanche, we monitor the time evolution of the underlying contact force network. When all contact