We describe the development of a Discrete Element Method (DEM) numerical simulation for granular systems. Starting from the 3-dimensional images of grain packs obtained by X-ray computed tomography we perform “virtual experiments” by reconstructing via DEM numerical samples of ideal spherical beads with desired (and tunable) properties. The resulting virtual packing has a structure that is almost identical to the experimental one. However, from these numerical samples we can calculate several static and dynamical properties (force network, avalanches precursors, stress paths, stability, fragility, ) which are otherwise not experimentally accessible. The simulations realistically take into account non-linear Hertzian repulsion, non-elastic collisions, viscous damping, gravity and friction.
All Science Journal Classification (ASJC) codes
- Materials Science(all)