Shearing behavior of polydisperse media

Details Shearing behavior of polydisperse media Shearing behavior of polydisperse media

2004-07-29

arxiv.org/abs/cond-mat/0407755v1

Physics

Condensed Matter

Soft Condensed Matter

17 pages, 15 figures

Scientific paper

10.1140/epje/i2004-10144-7

We study the shearing of polydisperse and bidisperse media with a size ratio of 10. Simulations are performed with a the two dimensional shear cell using contact dynamics. With a truncated power law for the polydisperse media we find that they show a stronger dilatancy and greater resistance to shearing than bidisperse mixtures. Motivated by the practical problem of reducing the energy needed to shear granular media, we introduce "point-like particles" representing charged particles in the distribution. Even though changing the kinematic behavior very little, they reduce the force necessary to maintain a fixed shearing velocity.

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