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A CONCURRENT MULTISCALE METHOD FOR SIMULATION OF CRACK PROPAGATION

ISSN号：0894-9166
期刊名称：《固体力学学报：英文版》
时间：0
分类：O346.1[理学—固体力学;理学—力学] TQ02[化学工程]
作者机构：[1]State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China, [2]Nanjing Research Institute of Electronics Technology, Nanjing 210039, China
相关基金：Project supported by the National Natural Science Foundation of China （Nos. 11232003, 11072051, 11272003 and 91315302）, the 111 Project （No. B08014）, the National Basic Research Program of China （Nos. 2010CB832704 and 2011CB013401）, Program for New Century Excellent Talents in University （No. NCET-13-0088） and Ph.D.Programs Foundation of Ministry of Education of China （No. 20130041110050）.

作者： Jingkai Wu[1,2], Hongwu Zhang[1], Yonggang Zheng[1]

关键词：多尺度方法, 裂纹扩展, 并发, 模拟, 种用, 有限元网格, 多尺度模型, 有限元方法, concurrent multiscale method, crack propagation, extended finite element method level set method

中文摘要：

A concurrent multiscale method is developed for simulating quasi-static crack propagation in which the failure processes occur in only a small portion of the structure. For this purpose, a multiscale model is adopted and both scales are discretized with finite-element meshes.The extended finite element method is employed to take into account the propagation of discontinuities on the fine-scale subregions. At the same time, for the other subregions, the coarse-scale mesh is employed and is resolved by using the extended multiscale finite element method. Several representative numerical examples are given to verify the validity of the method.

英文摘要：

A concurrent multiscale method is developed for simulating quasi-static crack propagation in which the failure processes occur in only a small portion of the structure. For this purpose, a multiscale model is adopted and both scales are discretized with finite-element meshes. The extended finite element method is employed to take into account the propagation of discontinuities on the fine-scale subregions. At the same time, for the other subregions, the coarse-scale mesh is employed and is resolved by using the extended multiscale finite element method. Several representative numerical examples are given to verify the validity of the method.