Why do granular materials stiffen with shear rate? Test of novel stress-based statistics.


Journal Article

Recent experiments exhibit a rate dependence for granular shear such that the stress grows linearly in the logarithm of the shear rate, gamma. 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(gamma))(1/2).

Full Text

Cited Authors

  • Behringer, RP; Bi, D; Chakraborty, B; Henkes, S; Hartley, RR

Published Date

  • December 2008

Published In

Volume / Issue

  • 101 / 26

Start / End Page

  • 268301 -

PubMed ID

  • 19437678

Pubmed Central ID

  • 19437678

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.101.268301


  • eng