History dependence of mechanical properties in granular systems

Details History dependence of mechanical properties in granular systems History dependence of mechanical properties in granular systems

2009-01-27

arxiv.org/abs/0901.4150v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 6 figures

Scientific paper

We study the history dependence of the mechanical properties of granular media by numerical simulations. We perform a compaction of frictional disk packings in a two-dimensional system by controlling the area of the domain with various strain rates. We then find the strain rate dependence of the critical packing fraction above which the pressure becomes finite. The observed behavior makes a contrast with the well-studied jamming transitions for frictionless disk packings. We also observe that the elastic constants of the disk packings depend on the strain rate logarithmically. This result provides a experimental test for the history dependence of granular systems.

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