The Fracture Mode Transition under Dynamic Loading of RSW Lap-shear Joints
Resistance spot welding (RSW) is still one of the prevalent joining technologies in automotive industry nowadays.During vehicle crash,two dominated fracture modes,pull-out fracture and interfacial fracture,can be observed.The fracture modes have significant influence on the joining performance and energy absorption of RSW joints.Plenty studies have focused on factors affecting fracture mode under quasi-static.The dynamic effect on fracture mode,however,has not been investigated thoroughly,and the underlying mechanism is also not quite clear.In this paper,quasi-static and dynamic tests were conducted to study the dynamic fracture behavior of RSW joints under lap-shear loading.A fracture mode transition from pull-out to interfacial fracture was observed.Miniature tests were then conducted to study the rate-effect on mechanical properties of fusion and heat affected zone,and to explain the fracture mode transition phenomenon.
resistant spot weld dynamic fracture
LI Wei XIA Yong YANG Xin ZHAO He
State Key Laboratory of Automotive Safety and Energy, Department of Automotive,Tsinghua University, General Motors, Shanghai, China
国际会议
成都
英文
586-589
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）