Low-cycle fatigue life prediction of spot welds based on hardness distribution and finite element analysis

被引：31
|
作者：
Wang, Rui-Jie [1 ]
Shang, De-Guang [1 ]
机构：
[1] Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100022, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2009年 / 31卷 / 03期
基金：
北京市自然科学基金;
关键词：
Hardness; Local stress-strain; Finite element analysis; Spot welds; Fatigue life; BEHAVIOR;
D O I：
10.1016/j.ijfatigue.2008.04.009
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Elasto-plastic finite element analysis was carried Out for single spot tensile shear spot welds with software ANSYS. According to the relationship between micro-hardness and strength, cyclic material constants of different zones in the periphery of spot welds were determined in accordance with hardness distribution, as well as base material fatigue parameters. Using the local stress and strain obtained from finite element analysis, fatigue lives of spot welds were predicted with Morrow's modified Manson-Coffin equation and Smith-Watson-Topper damage equation. Life prediction results showed that both equations gave good agreement with experimental data within low-cycle fatigue life regime. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：508 / 514
页数：7
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