模拟岩体失效全过程的连续–非连续变形体离散元方法及应用

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Abstract Rocks，concrete and other materials，due to the existence of inhomogeneity of mesoscopic structure，their fracture-broken development process and damage characteristics are associated with the distribution of micro cracks contained in the materials. Based on the idea of finite-discrete coupling analysis，a cohesive zone model based on elastoplastic fracture mechanics is employed to simulate the fracture of rock. In this model，the cohesive interface elements are inserted into the region of coarse aggregates and the parameters such as stiffness of the interface are deduced. If the interface cracks and failures，fracture will happen. Using uniaxial compression，a single particle breakage and slope instability simulation，the method is verified. The results show that this method can simulate the crack initiation and propagation effectively and reflect the whole process from small deformation to large deformation and failure.

Key words： rock mechanics deformation discrete elements cohesive zone model crack propagation

Received: 18 May 2011

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http://www.rockmech.org/EN/Y2011/V30/I10/2004

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