Continuum approach to fatigue crack initiation and propagation in welded steel joints

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• 作者：Heikki Remes ; ^{heikki.remes@aalto.fi} ; Petri Varsta ; Jani Romanoff
• 关键词：Fatigue initiation ; Fatigue crack growth ; Welded joints ; Heat-affected zone ; Grain size
• 刊名：International Journal of Fatigue
• 出版年：2012
• 出版时间：July, 2012
• 年：2012
• 卷：40
• 期：Complete
• 页码：16-26
• 全文大小：2127 K

文摘

In this paper, a continuum-based discrete crack growth approach is introduced for the fatigue life analysis of welded steel joints. The proposed approach applies cumulative damage models utilising the material hardness and grain size statistics. The approach is validated with fatigue strength tests, and the predicted crack growth rates and fatigue lives have been observed to be in good agreement with the experiments.