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| An enhanced finite element method with separate mathematical and physical mesh |
| Received:August 08, 2008 |
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| DOI：10.7511/jslx20093022 |
| KeyWord:enhanced finite element method cohesive zone model cohesive crack crack propagation |
| Author | Institution |
| 凌道盛 |
浙江大学 软弱土与环境土工教育部重点实验室,杭州 |
| 韩超 |
浙江大学 软弱土与环境土工教育部重点实验室,杭州 |
| 陈云敏 |
浙江大学 软弱土与环境土工教育部重点实验室,杭州 |
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| Abstract: |
| Basing on separation between mathematical meshes and physical meshes, the enhanced finite element method (FEM++) makes it easy to describe discontinuous deformation. The cohesive zone model (CZM) which can avoid the stress singularity at the crack tip is one of the most effective and simplest model to simulate the interaction within fracture process zone. FEM++ and CZM are applied to simulate the propagation of arbitrary cohesive crack by enriching mathematical node in this paper. The rule of mathematical node enrichment and mathematical element definition are also summarized, and an 8-16 node CZM element is proposed for cohesive crack. At last, three point bending beam is analyzed to illuminate the efficiency of the proposed method. |
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