TY - JOUR
T1 - Why do granular materials stiffen with shear rate? Test of novel stress-based statistics
AU - Behringer, R. P.
AU - Bi, D.
AU - Chakraborty, B.
AU - Henkes, S.
AU - Hartley, R. R.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2008/12/22
Y1 - 2008/12/22
N2 - Recent experiments exhibit a rate dependence for granular shear such that the stress grows linearly in the logarithm of the shear rate, γ̇. Assuming a generalized activated process mechanism, we show that these observations are consistent with a recent proposal for a stress-based statistical ensemble. By contrast, predictions for rate dependence using conventional energy-based statistical mechanics to describe activated processes, predicts a rate dependence of (ln (γ̇))1/2.
AB - Recent experiments exhibit a rate dependence for granular shear such that the stress grows linearly in the logarithm of the shear rate, γ̇. Assuming a generalized activated process mechanism, we show that these observations are consistent with a recent proposal for a stress-based statistical ensemble. By contrast, predictions for rate dependence using conventional energy-based statistical mechanics to describe activated processes, predicts a rate dependence of (ln (γ̇))1/2.
UR - http://www.scopus.com/inward/record.url?scp=58249105972&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.268301
DO - 10.1103/PhysRevLett.101.268301
M3 - Article (Academic Journal)
AN - SCOPUS:58249105972
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 26
M1 - 268301
ER -