Effect of friction and cohesion on anisotropy in quasi-static granular materials under shear

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Abstract

We study the effect of particle friction and cohesion on the steady-state shear stress and the contact anisotropy of a granular assembly sheared in a split-bottom ring shear cell. For non-cohesive frictional materials, the critical state shear stress first increases and then saturates with friction. The contact number density is found to decrease monotonically, while the anisotropy of the contact network saturates after an initial increase. For cohesive powders, the relation between shear stress and confining pressure becomes non-linear. Interestingly the contact number density stays almost unaffected, while the structural anisotropy decreases with increasing cohesion, hinting at a redistribution of the network with almost constant contact number density.
Original languageEnglish
Title of host publicationPowders and Grains 2013
Subtitle of host publicationProceedings of the 7th International Conference on Micromechanics of Granular Media
EditorsAibing Yu, Kejun Dong, Runyu Yang, Stefan Luding
PublisherAIP Publishing LLC
Pages682-685
ISBN (Print)978-0-7354-1166-1
DOIs
Publication statusPublished - 8 Jul 2013
Event7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia
Duration: 8 Jul 201312 Jul 2013
Conference number: 7
http://www.pg2013.unsw.edu.au/

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing LLC
Volume1542
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013
Abbreviated titlePowders & Grains
CountryAustralia
CitySydney
Period8/07/1312/07/13
Internet address

Keywords

  • Friction
  • Anisotropy
  • Fabric
  • Macroscopic friction

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  • Cite this

    Singh, A., Magnanimo, V., & Luding, S. (2013). Effect of friction and cohesion on anisotropy in quasi-static granular materials under shear. In A. Yu, K. Dong, R. Yang, & S. Luding (Eds.), Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media (pp. 682-685). (AIP Conference Proceedings; Vol. 1542). AIP Publishing LLC. https://doi.org/10.1063/1.4812023