Stress correlations in granular materials: an entropic formulation.


Journal Article

We study the response of dry granular materials to external stress using experiment, simulation, and theory. We derive a Ginzburg-Landau functional that enforces mechanical stability and positivity of contact forces. In this framework, the elastic moduli depend only on the applied stress. A combination of this feature and the positivity constraint leads to stress correlations whose shape and magnitude are extremely sensitive to the nature of the applied stress. The predictions from the theory describe the stress correlations for both simulations and experiments semiquantitatively.

Full Text

Cited Authors

  • Lois, G; Zhang, J; Majmudar, TS; Henkes, S; Chakraborty, B; O'Hern, CS; Behringer, RP

Published Date

  • December 28, 2009

Published In

Volume / Issue

  • 80 / 6 Pt 1

Start / End Page

  • 060303 -

PubMed ID

  • 20365107

Pubmed Central ID

  • 20365107

Electronic International Standard Serial Number (EISSN)

  • 1550-2376

International Standard Serial Number (ISSN)

  • 1539-3755

Digital Object Identifier (DOI)

  • 10.1103/physreve.80.060303


  • eng