铝合金点焊接头疲劳性能研究及寿命分析  

Fatigue Performance Study&Life Analysis of Aluminum Alloy Spot Welded Joint

作　　者：寇宏滨[1] 王得天[1] Kou Hongbin;Wang Detian(Pan Asia Technical Automotive Center Co.,Ltd.,Shanghai 201208)

机构地区：[1]泛亚汽车技术中心有限公司,上海201208

出　　处：《汽车工艺与材料》2021年第2期1-6,共6页Automobile Technology & Material

摘　　要：为了支持多环形纹路表面电极帽式铝合金点焊接头在车辆正向开发中的设计应用,设计并开展了一系列的铝合金点焊接头疲劳试验研究和疲劳寿命预测方法研究。过程中获得了点焊接头的载荷-寿命对应关系,总结了铝合金点焊接头疲劳强度受载荷方向、母材强度及厚度等因素影响的普遍规律,分析了铝合金点焊接头的疲劳失效破坏模式,并提出了评价铝合金点焊接头疲劳寿命的S-N曲线,可以有效指导铝合金点焊接头的抗疲劳设计开发工作。A series of physical durability tests and fatigue life prediction method studies are carried out,to support the design application of aluminum alloy spot-welded joint featuring multi-annular surface electrode cap in vehicle forward development.the corresponding relationship between load and fatigue life of spot welded joint is studied and abtained,the general rules are summarized to show the effect of base metal strength,base metal thickness and load direction on the fatigue strength of aluminum alloy spot-welded joint,the fatigue failure mode is analyzed.The S/N curves for evaluating the fatigue life of spot-welded joints are proposed,which can effectively guide the antifatigue design development of aluminum alloy spot-welded joint.

关 键 词：铝合金点焊接头 疲劳强度 疲劳寿命预测 

分 类 号：TG405[金属学及工艺—焊接] U465.1[一般工业技术—材料科学与工程]