Ordered packing induced by simultaneous shear and compaction

B. Hancock, M. Dutt, C. Bentham, J. Elliott

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We study a system of monodisperse frictional particles confined between two surfaces and being simultaneously sheared and uniaxially compacted by the upper surface. The upper surface is made of particles identical to those in the bulk, arranged randomly, or in a square or triangular lattice. The particles between the surfaces are allowed to compact under gravity after being poured onto the bottom surface, followed by simultaneous constant strain compaction and shear by the upper surface. We focus on the evolution of the packing structure with interparticle friction, arrangements of the particles on the surfaces, initial height of the confined gravitationally compacted particles and the shear and compaction strain rates. We compute the coordination number, packing fraction, contact orientation, distribution of contacts and other relevant quantities to provide quantitative insight on the packing structure. We have found, for a 5 diameter layer of confined particles, the compaction speed has a greater effect onthe packing structure of the particles incomparison tothe shear speed. For a shearing surface formed of particles arranged in a square lattice, the packing structure of the confined particles evolves to inter-digitating layers of 3D close-packed spheres. The numerical experiments have been performed via Discrete Element Method simulations (Dutt et al., 2004 submitted) using Microcrystalline Cellulose spheres.

Original languageEnglish (US)
Title of host publicationPowders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media
Pages25-28
Number of pages4
StatePublished - 2005
Externally publishedYes
Event5th International Conference on the Micromechanics of Granular Media: Powders and Grains 2005 - Stuttgart, Germany
Duration: Jul 18 2005Jul 22 2005

Publication series

NamePowders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media
Volume1

Other

Other5th International Conference on the Micromechanics of Granular Media: Powders and Grains 2005
Country/TerritoryGermany
CityStuttgart
Period7/18/057/22/05

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)

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