›› 2008, Vol. 29 ›› Issue (4): 865-870.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Microscopic critical state based on valence of granular materials

ZHANG Hong-wu, QIN Jian-min   

  1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
  • Received:2006-04-11 Online:2008-04-10 Published:2013-07-10

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Abstract: Numerical simulations of two-dimensional circular and ellipsoid particulate arrays are carried out based on granular discrete element method. The microscale deformations are measured based on void cells and the deformations occur in them. Deformations within individual voids are computed from the relative motions of surrounding particles. Based on the deformation mechanism, a more physical theory of critical state is developed in terms of valence (number of edges per void cell). Two ultimate cases with large and small friction coefficients are analyzed to define the maximum critical valence. The effects of particle shape, interparticle friction and consolidation stress of the granular assembly on the microscopic fabrics are investigated. The simulation results show that the microscopic critical state can not be characterized by a unique parameter, but depends on the shape and surface characteristic of the individual particles and consolidation stress of the particulate assembly.

Key words: granular materials, discrete element method, microscopic critical state, void cell, valence

CLC Number: 

  • O 347.7
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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