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Anisotropy in cohesive, frictional granular media

Stefan Luding

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The modelling of cohesive, frictional granular materials with a discrete particle molecular dynamics is reviewed. From the structure of the quasi-static granular solid, the fabric, stress, and stiffness tensors are determined, including both normal and tangential forces. The influence of the material properties on the flow behaviour is also reported, including relations between the microscopic attractive force and the macroscopic cohesion as well as the dependence of the macroscopic friction on the microscopic contact friction coefficient. Related to the dynamics, the anisotropy of both structure and stress are exponentially approaching the maximum.


PACS

45.70.-n Granular systems

46.25.-y Static elasticity

46.55.+d Tribology and mechanical contacts

Subjects

Condensed matter: structural, mechanical & thermal

Statistical physics and nonlinear systems

Dates

Issue 24 (22 June 2005)

Received 16 March 2005

Published 3 June 2005



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