Overshoot effect in the Janssen granular column: a crucial test for granular mechanics

We present experimental results on the mechanical behavior of static granular assemblies confined in a vertical column. Our measurements confirm the universal Janssen scaling for the stress saturation curve. We show consequently, in the context of isotropic elasticity, a relation between the Poisson...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2003-06, Vol.67 (6 Pt 1), p.060302-060302
Main Authors: Ovarlez, G, Fond, C, Clément, E
Format: Article
Language:English
Subjects:
Engineering Sciences
Materials and structures in mechanics
Mechanics
Physics
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Summary:We present experimental results on the mechanical behavior of static granular assemblies confined in a vertical column. Our measurements confirm the universal Janssen scaling for the stress saturation curve. We show consequently, in the context of isotropic elasticity, a relation between the Poisson ratio and the granular packing fraction. Moreover, using a systematic study of the overshoot effect created by a top mass equal to the saturation mass, we show behaviors that are reproduced qualitatively by isotropic elastic materials but of a spectacular amplitude in the case of a granular assembly. These experimental results are strong tests for any theory of granular matter.
ISSN:1539-3755
1550-2376
DOI:10.1103/physreve.67.060302