A simulation of fatigue crack propagation in a welded T-joint using 3D boundary element method

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• 作者：Xiang ; Zhihai ; Lie ; Seng Tjhen ; Wang ; Bo ; Cen ; Zhangzhi
• 关键词：3D fatigue surface crack ; Crack propagation ; T-joint ; Boundary element method
• 刊名：The International Journal of Pressure Vessels and Piping
• 出版年：2003
• 出版时间：February, 2003
• 年：2003
• 卷：80
• 期：2
• 页码：111-120
• 全文大小：347 K

文摘

A general procedure to investigate the fatigue propagation process of a 3D surface crack based on multi-region Boundary Element Method is detailed in this paper. The mesh can be automatically regenerated as the crack propagates. A new formula for estimating the effective stress intensity factor is used to calculate the crack extension. The maximum principal stress criterion is then employed to predict the crack growth direction. Comparison between numerical and experimental results of a welded T-joint shows that the proposed procedure is reliable.