Stress response function of a granular layer: quantitative comparison between experiments and isotropic elasticity

Details Stress response function of a granular layer: quantitative comparison between experiments and isotropic elasticity Stress response function of a granular layer: quantitative comparison between experiments and isotropic elasticity

2001-07-31

arxiv.org/abs/cond-mat/0107626v1

Physics

Condensed Matter

22 pages, 9 figures, submitted to Euro. Phys. J. E

Scientific paper

10.1007/s101890170019

We measured the vertical pressure response function of a layer of sand submitted to a localized normal force at its surface. We found that this response profile depends on the way the layer has been prepared: all profiles show a single centered peak whose width scales with the thickness of the layer, but a dense packing gives a wider peak than a loose one. We calculate the prediction of isotropic elastic theory in presence of a bottom boundary and compare it to the data. We found that the theory gives the right scaling and the correct qualitative shape, but fails to really fit the data.

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