Micropolar effects on instability within idealized granular materials

J. P. Bardet, Q. Huang

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


By using the results of numerical simulations, it is shown that the couples acting at particle contacts significantly influence the shear strength and the localized failure modes of idealized granular materials. In the absence of contact couples, the overall friction angle is smaller than the interparticle friction angle; this low friction angle results from the concentration of particle rotations within shear bands. In the presence of large reaction couples at particle contacts, the overall friction angle becomes much larger than the interparticle friction angle and the deformation localizes in failure patterns different from those observed experimentally in granular media. Preliminary experiments aiming at defining an improved relationship between the couple and rotation at particle contact indicate that the contact resistance to rotation increases linearly with normal contact forces.

Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
StatePublished - 1992
Externally publishedYes
EventASME Summer Mechanics and Materials Conferences - Tempe, AZ, USA
Duration: Apr 28 1992May 1 1992

ASJC Scopus subject areas

  • Mechanical Engineering


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