Investigation on dissimilar metal joints between aluminum alloy and steel
The joint of dissimilar materials has widely applied to the manufacture of vehicle bodies for the purposed of weight reduction.However,the joint of aluminum alloy and steel brings about new issues to the welding technology.Cold metal transfer(CMT)is a feasible process to join the dissimilar materials; however,the displacement of the welding occurs inevitably due to the different characteristics of the materials.The novelty of this paper lies in the investigation of the weld-induced stress and deformation.In this paper,the welding tests of the joining of Al/steel sheet were first performed.The parameters of the welding were determined.According to the thermo-elasto-plastic theory,the three-dimensional finite element model was developed using SYSWELD.Based on the newly proposed model,the temperature evolution and stress distribution were investigated.The study results show that the distribution of the equivalent stress on the weldment is asymmetrical due to the different characteristics of the material.There is larger residual stress on the side of steel sheet than that on the side of Al sheet.Besides,the fixture constrains have great impact on the distribution of residual stress.The findings are highly valuable to the applications such as auto-body lightweight structure.
Al/steel dissimilar materials lap joint numerical modeling welding deformation
Ji Qing Xing Yanfeng Xu Sha
Automotive Engineering College,Shanghai University of Engineering Science,Shanghai,China
国际会议
第十七届国际制造会议(The 17th International Manufacturing Conference in China)(IMCC 2017))
深圳
英文
1-16
2017-11-23（万方平台首次上网日期，不代表论文的发表时间）