Sensitivity of the stress response function to packing preparation

Details Sensitivity of the stress response function to packing preparation Sensitivity of the stress response function to packing preparation

2004-11-29

arxiv.org/abs/cond-mat/0411734v3

Physics

Condensed Matter

Soft Condensed Matter

15 pages, 11 figures, some numerical data corrected, to appear in J. Phys. Cond. Mat. special issue on Granular Materials (M.

Scientific paper

10.1088/0953-8984/17/24/002

A granular assembly composed of a collection of identical grains may pack under different microscopic configurations with microscopic features that are sensitive to the preparation history. A given configuration may also change in response to external actions such as compression, shearing etc. We show using a mechanical response function method developed experimentally and numerically, that the macroscopic stress profiles are strongly dependent on these preparation procedures. These results were obtained for both two and three dimensions. The method reveals that, under a given preparation history, the macroscopic symmetries of the granular material is affected and in most cases significant departures from isotropy should be observed. This suggests a new path toward a non-intrusive test of granular material constitutive properties.

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