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Indexed by:期刊论文

Date of Publication:2011-06-01

Journal:CHINESE PHYSICS LETTERS

Included Journals:Scopus、SCIE、ISTIC

Volume:28

Issue:6

ISSN No.:0256-307X

Abstract:Force networks may underlie the constitutive relations among granular solids and granular flows and inter-state transitions. However, it is difficult to effectively describe the anisotropy of force networks. We propose a new pair correlation function g(r, theta) to describe the characteristic lengths and orientations of force chains that are composed of particles with contact forces greater than the threshold values. A formulation g(r, theta) approximate to a(r)+b(r) cos2(theta-pi/2) is used to fit the g(r, theta) data. The characteristic lengths and orientations of force networks are then elucidated.