Analysis of the localization of damage and the complete stress-strain relation for mesoscopic heterogeneous brittle rock subjected to compressive loads |
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| Authors: | Zhou Xiao-ping Zhang Yong-xing Ha Qiu-ling Wang Jian-hua |
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| Affiliation: | 1. School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;2. School of Civil Engineering and Mechanics, Shanghai Jiaotong University, Shanghai 200030, P. R. China |
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| Abstract: | A micromechanics-based model is established. The model takes the interaction among sliding cracks into account, and it is able to quantify the effect of various parameters on the localization condition of damage and deformation for brittle rock subjected to compressive loads. The closed-form explicit expression for the complete stress-strain relation of rock containing microcracks subjected to compressive loads was obtained. It is showed that the complete stress-strain relation includes linear elasticity,nonlinear hardening,rapid stress drop and strain softening.The behavior of rapid stress drop and strain softening is due to localization of deformation and damage. Theoretical predictions have shown to be consistent with the experimental results. |
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| Keywords: | compressive load mesoscopic heterogeneous rock complete stress-strain relation localization of damage and deformation |
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