Effects of mean stress and crack closure on fatigue life of spot welds

被引：10

作者：

Henrysson, HF ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Mech, SE-41296 Gothenburg, Sweden

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2002年 / 25卷 / 12期

关键词：

crack closure; fatigue; finite element method; fracture mechanics; spot welds;

D O I：

10.1046/j.1460-2695.2002.00537.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The effects of mean stress and crack closure on fatigue life of spot welds were investigated. A review showed that several of the previously proposed mean stress corrections give similar results. Fatigue tests on shear and peel loaded specimens were carried out, and the results agreed with the corrections reviewed. The present study shows that crack closure explains the mean stress efforts observed. The crack opening force for spot welds was obtained, both experimentally from F-N curves with different load ratios and analytically from the available mean stress corrections. This was verified with detailed finite element simulations. Finally, the experiments and simulations indicate that the use of linear damage accumulation in fatigue life prediction of spot welds can be non-conservative.

引用

页码：1175 / 1185

页数：11

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