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Influence of Particle Shape on Shear Stress in Granular Media

In: Traffic and Granular Flow ’07

Author

Listed:
  • Emilien Azéma

    (LMGC, CNRS)

  • Farhang Radjaï

    (LMGC, CNRS)

  • Robert Peyroux

    (LMGC, CNRS)

  • Gilles Saussine

    (Innovation and Research Departement of SNCF)

Abstract

Summary 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.

Suggested Citation

  • Emilien Azéma & Farhang Radjaï & Robert Peyroux & Gilles Saussine, 2009. "Influence of Particle Shape on Shear Stress in Granular Media," Springer Books, in: Cécile Appert-Rolland & François Chevoir & Philippe Gondret & Sylvain Lassarre & Jean-Patrick Lebacq (ed.), Traffic and Granular Flow ’07, pages 497-505, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-77074-9_54
    DOI: 10.1007/978-3-540-77074-9_54
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