Dissipation in granular materials

Authors: E.Wolf, Dietrich; Radjai, Farhang; Dippel, Sabine

Source: Philosophical Magazine B, Volume 77, Number 5, 1 May 1998 , pp. 1413-1425(13)

Publisher: Taylor and Francis Ltd

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Abstract:

For two simple set-ups, 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 time 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 nondissipative.

Document Type: Research article

DOI: 10.1080/014186398258816

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