Comparative Study on Fatigue Properties of Friction Stir Welding Joint and Lap Joint
Friction Stir Welding (FSW) is a new type of solid-state connection which can reduce structural weight significantly.In this paper,fatigue tests and finite element analysis were employed to study fatigue properties of aerial aluminum alloy 2524-T3 FSW joint and lap joint.The S-N curves of specimens show that the fatigue strength of FSW joint is better than that of lap joint.Finite element models of two joints were established by ANSYS software.The residual stress of FSW joint were obtained by a nonlinear direct coupled-field analysis,and the detailed stress distribution of lap joint which under pulling force were simulated.On the basis of finite element analysis results,the fatigue lives of two types of joints were estimated.It is verified that the analytic and estimated results agree with that of experiment.The residual stress is the main factor affecting the fatigue life of FSW joint and the failure of lap joint is mainly caused by stress concentration of hole edge.
Friction stir welding Fatigue test S-N curve Finite element analysis Lap joint
Teng Zhang Yuting He Qing Shao Haiwei Zhang Liming Wu
Aeronautics and Astronautics Engineering College,Air Force Engineering University,Xian 710038,China
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）