Influence of particle shape on shear stress in granular media

Details Influence of particle shape on shear stress in granular media Influence of particle shape on shear stress in granular media

2007-09-14

arxiv.org/abs/0709.2241v1

Physics

Classical Physics

Scientific paper

We analyze the contact and force networks in a dense confined packing of pentagonal particles simulated by means of the contact dynamics method. The particle shape effect is evidenced by comparing the data from pentagon packing and from a packing with identical characteristics except for the circular shape of the particles. A surprising observation is that the pentagon packing develops a lower structural anisotropy than the disk packing. We show in this work that this weakness is compensated by a higher force anisotropy that leads to enhanced shear strength of the pentagon packing. With the polygonal shape of the particles, the strong force chains are mostly composed of edge-to-edge contacts with a marked zig-zag aspect.

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