Statistics of the Elastic Behavior of Granular Materials

Nicolaas P. Kruyt, L. Rothenburg

Research output: Contribution to journalArticleAcademicpeer-review

51 Citations (Scopus)

Abstract

The elastic behaviour of isotropic assemblies of granular materials consisting of two-dimensional, bonded and non-rotating particles is studied from the micromechanical viewpoint. Discrete element simulations have been performed of assemblies of 50,000 particles with various coordination numbers (average number of contacts per particle) and various ratios of tangential to normal stiffness. Statistics, such as mean, standard deviation and probability distribution function, have been computed for geometrical quantities and contact displacements under compressive and shearing loading. A linear relation is observed between the average number of contacts of a particle and its circumference. Average displacements do not conform to (generalised) uniform strain as is often assumed. The probability density functions for normal and tangential displacements are nearly Gaussian. None of the considered energies satisfy an equipartition of energy between normal and tangential modes.
Original languageEnglish
Pages (from-to)4879-4899
Number of pages21
JournalInternational journal of solids and structures
Volume38
Issue number28-29
DOIs
Publication statusPublished - 2001

Keywords

  • Elasticity
  • Granular materials
  • Micromechanics

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