Force network ensemble: a new approach to static granular matter

Details Force network ensemble: a new approach to static granular matter Force network ensemble: a new approach to static granular matter

2003-08-12

arxiv.org/abs/cond-mat/0308225v2

Phys. Rev. Lett. 92, 054302 (2004).

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures, changed content

Scientific paper

10.1103/PhysRevLett.92.054302

An ensemble approach for force distributions in static granular packings is developed. This framework is based on the separation of packing and force scales, together with an a-priori flat measure in the force phase space under the constraints that the contact forces are repulsive and balance on every particle. We show how the formalism yields realistic results, both for disordered and regular ``snooker ball'' configurations, and obtain a shear-induced unjamming transition of the type proposed recently for athermal media.

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