Dynamic phases and force chains in a sheared granular lattice gas

B. W. Fitzgerald, D. Corcoran

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Traditionally, molecular dynamic simulations have been employed to study granular dynamics. We present for the first time a modified lattice gas model (Sheared Granular Lattice Gas or SGLG model) to simulate an externally sheared granular medium, in which granular particles of binary velocity and unit mass interact by collision on a hexagonal lattice, with friction and dissipative forces implemented probabilistically. Force chains are deformed in a random manner and particle motion in the proximity of the shearing plane is also induced probabilistically. A visualization of a force chain configuration and temporal fluctuations in the stress are presented for various lattice site fractions. In particular a continuous jamming-unjamming phase transition is found in agreement with extant experimental and computational studies, which is remarkable, since force balance in the force chain deformation process has purposely been excluded.

Original languageEnglish
Title of host publicationPowders Grains - Proc. Int. Conf. Micromechanics Granular Media
Pages773-777
Number of pages5
Publication statusPublished - 2005
Event5th International Conference on the Micromechanics of Granular Media: Powders and Grains 2005 - Stuttgart, Germany
Duration: 18 Jul 200522 Jul 2005

Publication series

NamePowders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media
Volume2

Conference

Conference5th International Conference on the Micromechanics of Granular Media: Powders and Grains 2005
Country/TerritoryGermany
CityStuttgart
Period18/07/0522/07/05

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