Observations on the effects of particle rotations on the failure of idealized granular materials

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

Based on the computer simulations of biaxial tests, particle rotations are shown to have little influence on the elastic properties of idealized granular materials, but significant effects on their shear strength. The overall peak and residual friction angles, øp and ør, are smaller than the interparticle friction angle øμ because of the concentration of rotations in shear bands. When particle rotations are artificially prevented, øp and ør, become larger than øμ and the localized failure patterns become different from those observed experimentally in granular media. The average particle rotation remains small in the complete biaxial specimen, but increases in shear bands. The particle rotations follow an exponential distribution independent of the axial strain. Particle rotations induce twice as many rolling contacts as sliding contacts. Compared to sliding contacts, rolling contacts are oriented differently, generate different fabric tensors, and are less capable of dissipating energy and supporting inclined contact forces.

Original languageEnglish (US)
Pages (from-to)159-182
Number of pages24
JournalMechanics of Materials
Volume18
Issue number2
DOIs
StatePublished - 1994
Externally publishedYes

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Granular materials
granular materials
Particles (particulate matter)
sliding contact
Shear bands
friction
Friction
shear
axial strain
shear strength
Shear strength
Tensors
elastic properties
computerized simulation
tensors
Computer simulation

ASJC Scopus subject areas

  • Mechanics of Materials

Cite this

Observations on the effects of particle rotations on the failure of idealized granular materials. / Bardet, Jean-Pierre.

In: Mechanics of Materials, Vol. 18, No. 2, 1994, p. 159-182.

Research output: Contribution to journalArticle

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