Stress response function of a granular layer: quantitative comparison between experiments and isotropic elasticity
arXiv:cond-mat/0107626 · doi:10.1007/s101890170019
Abstract
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.
22 pages, 9 figures, submitted to Euro. Phys. J. E
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