A FATIGUE DESIGN PARAMETER FOR SPOT WELDS

被引：59

作者：

SWELLAM, MH ^{[1
]}

BANAS, G ^{[1
]}

LAWRENCE, FV ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT CIVIL ENGN,CHICAGO,IL 60680

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1994年 / 17卷 / 10期

关键词：

D O I：

10.1111/j.1460-2695.1994.tb01408.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Mode I and mode II stress intensity factors for two half-spaces connected by a circular patch were used to develop a mixed-mode stress intensity factor (termed the stress index K-i) which can correlate the fatigue life of all spot weld geometries, base metals, and specimen dimensions. Empirical corrections were applied to Broek's equivalent stress intensity factor (K-Ieq) to account for the weldment geometry (sheet thickness, nugget diameter, specimen width) and the effect of mean stress. The final expression, (K-i), is a measure of the notch-root stress field in the location where crack initiation and early crack growth occur. The stress index (K-i) should be a useful tool for spot-weld fatigue design.

引用

页码：1197 / 1204

页数：8