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Numerical simulation of crack propagation by manifold method

Numerical simulation of crack propagation by manifold method
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摘要 In this paper, by means of the maximum circle tensile stress on curve of constant ω and stress intensity factors by a path independent contour integral method, trajectories of maxed mode crack propagation are simulated through numerical manifold method. The crack propagation is traced dynamically by modifying the neighboring connection between the crack-top and nodes within elements in the calculating process. This method has the advantages such as less modified area, easiness of programming, high realizability and so on. Then a single sharp nicked specimen is used to verified the numerical result. It is shown that the provided method is reasonable and effective. In this paper, by means of the maximum circle tensile stress on curve of constant ω^- and stress intensity factors by a path independent contour integral method, trajectories of maxed mode crack propagation are simulated through numerical manifold method. The crack propagation is traced dynamically by modifying the neighboring connection between the crack-top and nodes within elements in the calculating process. This method has the advantages such as less modified area, easiness of programming, high realizability and so on. Then a single sharp nicked specimen is used to verified the numerical result. It is shown that the provided method is reasonable and effective.
作者 吕文阁
出处 《Journal of Chongqing University》 CAS 2006年第2期71-76,共6页 重庆大学学报(英文版)
基金 Funded by the National Natural Science Foundation of China (No. 10272033) and Guangdong Provincial Natural Science Foundation(Nos.04105386,5300090 and 05001844).
关键词 numerical manifold method crack propagation path independent contour integral 裂纹扩展 数值模拟 拉伸试验 应力强度因子
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