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Article Dans Une Revue Philosophical Magazine B Année : 1998

Dissipation in granular materials

Farhang Radjai

Résumé

For two simple set-up, we discuss how dissipative grain-grain interactions give rise to unexpected properties on large scales. In the first example, a spherical particle rolling along a rough surface experiences an effective viscous friction on large lime scales. It is due to temporal correlations among collisions with incomplete normal restitution. The second example is a sheared granular packing. There, spatial correlations among non-sliding and sliding contacts with Coulomb friction suggest that the deviatoric stress, although responsible for the dissipation , is localized on bonds that are non-sliding and hence non-dissipative
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hal-01425301 , version 1 (03-01-2017)

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Dietrich E Wolf, Farhang Radjai, Sabine Dippel. Dissipation in granular materials. Philosophical Magazine B, 1998, 77, pp.1413 - 1425. ⟨10.1080/13642819808205033⟩. ⟨hal-01425301⟩
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