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| Coupled SBFEM and FEM for crack analysis based on virtual discontinuous surface method |
| Received:August 04, 2013 Revised:November 19, 2013 |
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| DOI：10.7511/jslx201406009 |
| KeyWord:scaled boundary finite element method crack stress intensity factors virtual discontinuous surface |
| Author | Institution |
| 殷德胜 |
三峡大学 水利与环境学院, 宜昌 ;三峡地区地质灾害与生态环境湖北省协同创新中心, 宜昌 |
| 尹栓 |
三峡大学 水利与环境学院, 宜昌 |
| 周宜红 |
三峡大学 水利与环境学院, 宜昌 ;三峡地区地质灾害与生态环境湖北省协同创新中心, 宜昌 |
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| Abstract: |
| The newly-developed scaled boundary finite element method (SBFEM) is well in calculating stress intensity factors directly and precisely because the singularity in stress solutions crack tips is analytically represented.This study develops a novel virtual discontinuous surface method that couples the finite element method (FEM) and the scaled boundary finite-element method (SBFEM) for crack propagation modelling.Firstly,the structure containing cracks is divided into two independent zones,one contains cracks is discrete with SBFEM meshes and another without crack is discrete with FEM meshes.Then,the corresponding displacement interpolation models are used for each mesh respectively.At last,the virtual discontinuous surface will be utilized between the two zones for the coupling of SBFEM and FEM.The accuracy factors of this method,such as the shape,element size within SBFEM domain,are studied by simulations of two classic cracked plates.The example studies indicate that the pre-processing of this new method is quite simple,and calculated precision is relatively high. |
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