A micromechanical investigation of the influence of couple stresses on failure in granular materials

Jean-Pierre Bardet; Q. Huang; J. Proubet

A micromechanical investigation of the influence of couple stresses on failure in granular materials

Jean-Pierre Bardet, Q. Huang, J. Proubet

Research output: Contribution to conference › Paper › peer-review

Abstract

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.

Original language	English (US)
Pages	609-617
Number of pages	9
State	Published - Jan 1 1992
Externally published	Yes
Event	33rd U.S. Symposium on Rock Mechanics, USRMS 1992 - Santa Fe, United States Duration: Jun 3 1992 → Jun 5 1992

Other

Other	33rd U.S. Symposium on Rock Mechanics, USRMS 1992
Country	United States
City	Santa Fe
Period	6/3/92 → 6/5/92

ASJC Scopus subject areas

Geology
Geophysics
Geotechnical Engineering and Engineering Geology

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abstract = "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.",

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N2 - 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.

AB - 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.

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