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2012年 第6卷 第1期

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《结构与土木工程前沿（英文）》 >> 2012年 第6卷 第1期 doi: 10.1007/s11709-012-0139-9

3D mode discrete element method with the elastoplastic model

1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. China State Construction Property Corp. Ltd., Beijing 100037, China; 3. Chengdu Hydroelectric Investigation & Design Institute of SPC, Chengdu 610072, China

发布日期： 2012-03-05
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The three-dimensional mode-deformable discrete element method (3MDEM) is an extended distinct element approach under the assumptions of small strain, finite displacement, and finite rotation of blocks. The deformation of blocks is expressed by the combination of the deformation modes in 3MDEM. In this paper, the elastoplastic constitutive relationship of blocks is implemented on the 3MDEM platform to simulate the integrated process from elasticity to plasticity and finally to fracture. To overcome the shortcomings of the conventional criterion for contact fracturing, a new criterion based on plastic strain is introduced. This approach is verified by two numerical examples. Finally, a cantilever beam is simulated as a comprehensive case study, which went through elastic, elastoplastic, and discontinuous fracture stages.

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