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A discrete thermodynamic approach for anisotropic plastic–damage modeling of cohesive‐frictional geomaterials
Author(s) -
Zhu Q. Z.,
Zhou C. B.,
Shao J. F.,
Kondo D.
Publication year - 2010
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.857
Subject(s) - anisotropy , plasticity , hardening (computing) , materials science , mechanics , structural engineering , damage mechanics , flow (mathematics) , geotechnical engineering , geology , composite material , engineering , physics , finite element method , layer (electronics) , quantum mechanics
A discrete plastic–damage model is developed for cohesive‐frictional geomaterials subjected to compression‐dominated stresses. Macroscopic plastic strains of material are physically generated by frictional sliding along weakness planes. The evolution of damage is related to the evolution of weakness planes physically in connection with the propagation of microcracks. A discrete approach is used to account for anisotropic plastic flow and damage evolution, by introducing two stress invariants and one plastic hardening variable for each family of sliding weakness planes. Plastic flow in each family is coupled with damage evolution. The proposed model is applied to typical geomaterials and comparisons between numerical predictions and experimental data are presented. Copyright © 2009 John Wiley & Sons, Ltd.