Micromechanics modelling for stress–strain behaviour of brittle rocks

✍ Scribed by Chunlin Li

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 718 KB
• Volume: 19
• Category: Article
• ISSN: 0363-9061
• DOI: 10.1002/nag.1610190503

✦ Synopsis

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.