Influence of polydispersity on micromechanics of granular materials

Details Influence of polydispersity on micromechanics of granular materials Influence of polydispersity on micromechanics of granular materials

2011-07-11

arxiv.org/abs/1107.2069v2

Phys. Rev. E 85, 011301 (2012)

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 13 figures, 2 tables

Scientific paper

We study the effect of polydispersity on the macroscopic physical properties of granular packings in two and three dimensions. A mean-field approach is developed to approximate the macroscale quantities as functions of the microscopic ones. We show that the trace of the fabric and stress tensors are proportional to the mean packing properties (e.g. packing fraction, average coordination number, and average normal force) and dimensionless correction factors, which depend only on the moments of the particle-size distribution. Similar results are obtained for the elements of the stiffness tensor of isotropic packings in the linear affine response regime. Our theoretical predictions are in good agreement with the simulation results.

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