A study on fatigue crack initiation point of load-carrying fillet welded cruciform joints

被引：62

作者：

Kainuma, Shigenobu ^{[1
]}

Mori, Takeshi ^{[2
]}

机构：

[1] Kyushu Univ, Dept Civil Engn, Nishi Ku, Fukuoka 8190395, Japan

[2] Hosei Univ, Dept Civil Engn, Koganei, Tokyo 1848584, Japan

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2008年 / 30卷 / 09期

关键词：

fatigue crack initiation; fatigue crack propagation; cruciform joint; fillet weld; residual stress;

D O I：

10.1016/j.ijfatigue.2007.11.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Load-carrying fillet welded cruciform joints have two fatigue crack initiating points. These are located at the weld toes and weld roots, where high stress concentrations occur. The location of the fatigue crack initiation depends on the weld size, plate thickness and weld penetration. These mechanisms are easily understood. Previous experimental results have indicated that the fatigue crack originating point is also influenced by the magnitude of the stress range, but the reason for this phenomenon is not yet clear. To better understand this phenomenon, fatigue tests on welded joint specimens were performed in this study. In addition, the welding residual stresses were analyzed with a thermo-elastic-plastic finite element method. Finally, a fatigue crack propagation analysis that considered the residual stresses was performed. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1669 / 1677

页数：9

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