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| Manifold element cover renewal and parameter inheritance method under crack propagation |
| Received:January 31, 2024 Revised:April 30, 2024 |
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| DOI：10.7511/jslx20240131002 |
| KeyWord:numerical manifold method physical cover renewal parameter inheritance crack propagation |
| Author | Institution |
| 程寿山 |
交通运输部公路科学研究所 旧桥检测与加固交通行业重点实验室北京, 北京 |
| 胡鑫 |
河北工业大学 土木与交通学院, 天津 |
| 胡宁 |
河北工业大学 土木与交通学院, 天津 |
| 黄海新 |
河北工业大学 土木与交通学院, 天津 |
| 许瑞宁 |
河北交通投资集团有限公司太行创新研究院, 石家庄 |
| 张连振 |
哈尔滨工业大学 交通科学与工程学院, 哈尔滨 |
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| Abstract: |
| The numerical manifold method(NMM)provides a unified solution for solving continuous and discontinuous problems,with the premise of ensuring the accuracy and stability of the covering generation system.A covering updating method is developed based on the NMM covering system generation theory to address the covering generation problem under crack extension and new crack initiation,which is simple to implement and effectively eliminates the refinement mesh at the crack tip before extension,and realizes mesh refinement at the crack tip after extension.Moreover,to deal with the parameter inheritance issue introduced by the introduction of the crack tip asymptotic function,a parameter inheritance strategy covering conventional physical coverage and singular physical coverage is proposed.By conducting multiple-crack extension and new crack initiation tests on rectangular plates with two initial cracks and comparing the results with SCB specimen experiments,the accuracy of the proposed method in simulating crack propagation is verified. |
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