Structural Engineering and Mechanics

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A technique for capturing structural crack geometry in numerical simulation based on the invariant level set method

  • Tao Wang (School of Civil Engineering, Central South University) ;
  • Shangtao Hu (School of Civil Engineering, Central South University) ;
  • Menggang Yang (School of Civil Engineering, Central South University) ;
  • Shujun Fang (School of Civil Engineering, Central South University)
  • Received : 2023.02.15
  • Accepted : 2023.06.29
  • Published : 2023.08.10
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Abstract

Engineering structures usually suffer from cracks. The crack geometry has an influence on the structural mechanical properties and subsequent crack propagations. However, as an extensively utilized method in fracture analysis, the extended finite element method provided by Abaqus fails to output the specific location and dimensions of fractures. In this study, a technique to capture the crack geometry is proposed. The technique is based on the invariant level set method (I-LSM), which can avoid updating the level set function during crack development. The solution is achieved by an open-source plug-in programmed by Python. Three examples were performed to verify the effectiveness and robustness of the program. The result shows that the developed program can accurately output the crack geometry in both the 2D and 3D models. The open-source plug-in codes are included as supplementary material.

Keywords

Acknowledgement

The authors gratefully acknowledge the financial support for this research provided by the National Natural Science Foundation of China (grant numbers 52278232 and 51978667), the Science and Technology Research and Development Program Project of China State Railway Group Co., Ltd. (Major Special Project, No. 2021-Special-04-2).

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