Influence of Particle Shape on Shear Stress in Granular Media

Emilien Azéma (), Farhang Radjaï, Robert Peyroux and Gilles Saussine ()
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Emilien Azéma: LMGC, CNRS
Farhang Radjaï: LMGC, CNRS
Robert Peyroux: LMGC, CNRS
Gilles Saussine: Innovation and Research Departement of SNCF

A chapter in Traffic and Granular Flow ’07, 2009, pp 497-505 from Springer

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.

Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-77074-9_54

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DOI: 10.1007/978-3-540-77074-9_54

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