Force networks and the dynamic approach to jamming in sheared granular media

Details Force networks and the dynamic approach to jamming in sheared granular media Force networks and the dynamic approach to jamming in sheared granular media

2006-12-28

arxiv.org/abs/cond-mat/0612680v1

Europhysics Letters 80, 58001 (2007)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1209/0295-5075/80/58001

Diverging correlation lengths on either side of the jamming transition are used to formulate a rheological model of granular shear flow, based on the propagation of stress through force chain networks. The model predicts three distinct flow regimes, characterized by the shear rate dependence of the stress tensor, that have been observed in both simulations and experiments. The boundaries separating the flow regimes are quantitatively determined and testable. In the limit of jammed granular solids, the model predicts the observed anomalous scaling of the shear modulus and a new relation for the shear strain at yield.

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