Article Dans Une Revue Granular Matter Année : 2011

Interface roughness effect on slow cyclic annular shear of granular materials

Georg Koval
François Chevoir
Jean-Noël Roux
Jean Sulem
Alain Corfdir

Résumé

We experimentally investigate the mechanical behaviour in cyclic shear of a granular material near a solid wall in a pressure controlled annular shear cell. The use of a model system (glass beads and saw-tooth shaped solid surface) enables the study of the influence of the wall roughness. After an initial shakedown procedure ensuring reproducible results in subsequent tests, wall shear stress S , volumetric variation Δ V , and the displacement field of the sample bottom surface, are recorded as functions of wall displacement. A dimensionless roughness parameter Rn is shown to control the interface response. The local grain-level or mesoscale behaviour is directly correlated to the global one on the scale of the whole sample.

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hal-00693173 , version 1 (02-05-2012)

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Georg Koval, François Chevoir, Jean-Noël Roux, Jean Sulem, Alain Corfdir. Interface roughness effect on slow cyclic annular shear of granular materials. Granular Matter, 2011, 13, pp.525-540. ⟨10.1007/s10035-011-0267-2⟩. ⟨hal-00693173⟩
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