Shear Zones in granular materials: Optimization in a self-organized random potential

Details Shear Zones in granular materials: Optimization in a self-organized random potential Shear Zones in granular materials: Optimization in a self-organized random potential

2006-07-06

arxiv.org/abs/cond-mat/0607162v1

Phys. Rev. E 75, 011305 (2007)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures

Scientific paper

10.1103/PhysRevE.75.011305

We introduce a model to describe the wide shear zones observed in modified Couette cell experiments with granular material. The model is a generalization of the recently proposed approach based on a variational principle. The instantaneous shear band is identified with the surface that minimizes the dissipation in a random potential that is biased by the local velocity difference and pressure. The apparent shear zone is the ensemble average of the instantaneous shear bands. The numerical simulation of this model matches excellently with experiments and has measurable predictions.

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