Extent of force indeterminacy in packings of frictional rigid disks

M. Reza Shaebani, Tamás Unger, János Kertész

Research output: Contribution to journalArticlepeer-review

Abstract (may include machine translation)

Static packings of frictional rigid particles are investigated by means of discrete element simulations. We explore the ensemble of allowed force realizations in the space of contact forces for a given packing structure. We estimate the extent of force indeterminacy with different methods. The indeterminacy exhibits a nonmonotonic dependence on the interparticle friction coefficient. We verify directly that larger force indeterminacy is accompanied by a more robust behavior against local perturbations. We also investigate the local indeterminacy of individual contact forces. The probability distribution of local indeterminacy changes its shape depending on friction. We find that local indeterminacy tends to be larger on force chains for intermediate friction. This correlation disappears in the large friction limit.

Original languageEnglish
Article number052302
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume79
Issue number5
DOIs
StatePublished - 27 May 2009
Externally publishedYes

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