机械科学与技术2024，Vol.43Issue(1)：90-95,6.DOI:10.13433/j.cnki.1003-8728.20220193
多点点焊件疲劳寿命分析
Analysis of Fatigue Life for Multi-spot Welding
摘要
Abstract
According to the constant amplitude fatigue test results of ST12 steel double-spot and three-spot tensile shear resistance spot welded specimens,the fatigue lives were predicted by using the notch stress method and equivalent structure stress method respectively.While using notch stress method,the three-dimensional solid finite element models for double-spot and three-spot tensile shear spot weld according to the actual specimen size and the recommendation of International institute of welding(IIW),the von Mises maximum stress change regime were obtained from the finite element results,the fatigue lives were predicted according to the S-N curve in the IIW recommended standard and while using the structural stress method,a hybrid model for beam and shell stress analysis,then the fatigue lives were predicted according to the main S-N curve.The results showed that the results predicted by using the notch stress method and the equivalent structural stress method are well correlated relatively to the actual lives of the specimen within low cycle regime,where the results by using the equivalent structural stress method are closer to the experimental results.关键词
电阻点焊/有限元弹性分析/缺口应力法/等效结构应力法/疲劳寿命Key words
resistance spot welded/finite element elastic analysis/notch stress method/equivalent structural stress method/fatigue life分类
矿业与冶金引用本文复制引用
覃秋雷,王瑞杰,武陇岗..多点点焊件疲劳寿命分析[J].机械科学与技术,2024,43(1):90-95,6.基金项目
国家自然科学基金项目(51065012) （51065012）
