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Alternative TitleA block-discrete-spring model to simulate failure process of rock
王杰; 李世海; 周东; 张青波
Source Publication岩土力学
Other AbstractA block-discrete-spring model based on deformable discrete element method is established; this model would be applied to simulate the rock failure process. In this model, the theoretical basis is continuum mechanics and block element is divided into discrete spring system with specific physical meaning. The stiffness of the spring can be obtained from the energy functional. In this way, element deformation and stress would be calculated by spring stiffness directly and efficiently. In the case of rock mass slope under gravity, the elastic result achieved with this model is the same as that of traditional finite element method. (FEM). On this basis, Mohr-Coulomb criterion with a tensile cutoff which used to judge the failure state and broken direction is proposed and implemented into the block-discrete-spring model. After the internal failure face established, the element will be divided into two elements by means of cutting block; and double judgement including element boundary and element interior is adopted to realize the crack initiation and propagation, which could mitigate the effect of initial mesh. Finally, the rationality of the failure result calculated by block-discrete-spring model is approved by some cases including split test with flattened disk, uniaxial compression and three point bending. The results show that this method can well simulate the crack initiation and propagation under tensile, compressive and shear conditions, by which the rock failure process can be realized from continuum to discontinuum.
Keyword岩石力学 离散弹簧 单元破裂 裂纹扩展
Subject Area岩体力学和土力学
Indexed ByEI ; CSCD
Funding Organization国家重点基础研究发展计划(973)项目资助(No.2010CB731506);国家自然科学基金重点项目资助(No.10632100)
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Document Type期刊论文
Corresponding Author王杰
Recommended Citation
GB/T 7714
王杰,李世海,周东,等. 模拟岩石破裂过程的块体单元离散弹簧模型[J]. 岩土力学,2013,34(8):2355-2362.
APA 王杰,李世海,周东,&张青波.(2013).模拟岩石破裂过程的块体单元离散弹簧模型.岩土力学,34(8),2355-2362.
MLA 王杰,et al."模拟岩石破裂过程的块体单元离散弹簧模型".岩土力学 34.8(2013):2355-2362.
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