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Micromechanics modelling for stress–strain behaviour of brittle rocks
Author(s) -
Li Chunlin
Publication year - 1995
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.1610190503
Subject(s) - micromechanics , brittleness , cataclastic rock , geology , deformation (meteorology) , stress (linguistics) , shear (geology) , geotechnical engineering , materials science , fracture (geology) , shear stress , composite material , seismology , fault (geology) , linguistics , philosophy , composite number
A micromechanics model for stress–strain behaviour of brittle rocks has been developed. Microcracking is the mechanism of the non‐linear deformation behaviour for brittle rocks in the pre‐peak stage. The non‐linear behaviour in this stage is simulated by considering the local axial splitting of microcracks. The relationships between the compressive stresses, the growth of microcracks, and the fracture‐induced deformation are analytically established. In the post‐peak stage the shear faulting predominates the process of deformation, which is simulated by a damage model. This micromechanics model is helpful in understanding the failure process in brittle rocks. The model can be used to simulate the complete stress–strain behaviour of rock. The model simulations are consistent with experimental results.