Unsteady shear of dense assemblies of cohesive granular materials under constant volume conditions

Lee R. Aarons, Jin Sun, Sankaran Sundaresan

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The response characteristics of dense assemblies of cohesive granular materials to unsteady simple shear in the quasi-static regime are investigated through discrete element method (DEM) simulations of monodisperse spherical and frictional particles in periodic domains at constant volume. The dynamics of the volume-averaged normal and shear stresses in materials, undergoing stop-and-go shearing and oscillatory shear, are studied in detail. Furthermore, the evolution of microstructure anisotropy has been quantified through a fabric tensor. The stresses and the microstructure anisotropy depend on the strain extent but not on the shear rate. They both undergo a transition following reversal of shear direction, which requires a shear strain of order unity to fully adapt. The results reveal a correlation between the stress evolution and the microstructure anisotropy development.

Original languageEnglish (US)
Pages (from-to)5153-5165
Number of pages13
JournalIndustrial and Engineering Chemistry Research
Volume49
Issue number11
DOIs
StatePublished - Jun 2 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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