中国机械工程Issue(20)：2806-2809,2810,5.DOI:10.3969/j.issn.1004-132X.2014.20.019
铝合金点焊拉剪接头疲劳性能及寿命分析
Fatigue Performance and Fatigue Life Prediction of Aluminum Resistance Spot Welded Tensile Shear Specimen
摘要
Abstract
Fatigue performance of spot welds of aluminum alloy AA5754 was investigated experi-mentally herein .Fatigue failure mode of spot welded tensile shear specimen was discussed and fatigue crack growth path was also explored .Theoretical crack growth angle was determined for tensile shear specimen ,which was under mix mode I/II loading ,and results were verified by measured angles of failed specimens .Local stress intensity factor at nugget circumference was derived ,modified by actual fatigue crack length in sheet thickness and treated as a fatigue parameter K(i) in fatigue data correla-tion .The proposed fatigue delete parameter is proven efficient in correlating fatigue data and can be used for fatigue life prediction of aluminum resistance spot welds .关键词
铝合金/电阻点焊/疲劳性能/疲劳参量Key words
aluminum alloy/resistance spot welding/fatigue performance/fatigue parameter分类
矿业与冶金引用本文复制引用
石燕栋,郭海丁..铝合金点焊拉剪接头疲劳性能及寿命分析[J].中国机械工程,2014,(20):2806-2809,2810,5.基金项目
江苏省普通高校研究生科研创新计划资助项目 （）
