Jamming of frictional spheres and random loose packing
arXiv:1108.0012 · doi:10.1039/C001973A
Abstract
The role of friction coefficient, , on the jamming properties of disordered, particle packings is studied using computer simulations. Compressed, soft-sphere packings are brought towards the jamming transition - the point where a packing loses mechanical stability - by decreasing the packing fraction. The values of the packing fraction at the jamming transition, , gradually decrease from the random close packing point for zero friction, to a value coincident with random loose packing as the friction coefficient is increased over several orders of magnitude. This is accompanied by a decrease in the coordination number at the jamming transition, , which varies from approximately six to four with increasing friction. Universal power law scaling is observed in the pressure and coordination number as a function of distance from the generalised, friction-dependent jamming point. Various power laws are also reported between the , , and . Dependence on preparation history of the packings is also investigated.
arXiv commentPublished in Soft Matter themed issue on Granular and jammed materials (2010)
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