Tian-Wei LIU, Wen-Jie XU*, Hai-Yang ZHANG
Discrete element analysis of the effect of meso-structure heterogeneity on the mechanical behavior of rock
Rock Characterisation, Modelling and Engineering Design Methods, Proceedings of the 3rd ISRM SINOROCK 2013 Symposium. (国际会议, EI)
The effect of meso-structure heterogeneity in material on the mechanical behavior of rock is studied in this paper, using Discrete Element Method andWeibull distribution model. Several triaxial compressive tests are conducted. Different meso-structure distributions are used. It is shownby numerical tests that the different internal meso-structure distribution can have considerable effects on the compressive strength, crack initiation stress and stress-strain relationship, and other macro-properties. The micromechanical behavior of rock samples is affected by the distribution of internal meso-structure parameters as well. The deformation and failure of rock is simulated by tracing the extension of the microscopic cracks and the micromechanical behaviors. Results demonstrate that the meso-structure heterogeneity have considerable effects on the mechanical behavior of rock.