TY - GEN
T1 - Dynamic phases and force chains in a sheared granular lattice gas
AU - Fitzgerald, B. W.
AU - Corcoran, D.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84857594824&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84857594824
SN - 0415383471
SN - 9780415383479
T3 - Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media
SP - 773
EP - 777
BT - Powders Grains - Proc. Int. Conf. Micromechanics Granular Media
T2 - 5th International Conference on the Micromechanics of Granular Media: Powders and Grains 2005
Y2 - 18 July 2005 through 22 July 2005
ER -