In this paper, the welding residual distortion of aluminum alloy thin plates is predicted using the elasticity-plasticity finite element method (FEM). The factors contributing to the welding buckling distortion of thin plates are studied by investigating the formation and evolution process of welding stresses. Results of experiments and numerical simulations show that the buckling appearance of thin-plate aluminum alloy weldments is asymmetrical in the welding length direction, and the maximum longitudinal deflection appears at the position a certain distance from the middle point of the side edge towards the arc-startingexists end. The angular deformation direction of thin-plate weldments is not fixed, and the angular deformation value of the arc-starting end is being higher than that of the arc-blowout end.
Zhang J Q, Zhang G D, Zhao H Y, . 3D-FEM numerical simulation of welding stress in thin aluminum alloy plate. Transactions of the China Welding Institution , 2007, 28(6): 5-9 (in Chinese)
2
Li Y J, Wang J. Welding and Application of Nonferrous Metal. Beijing: Chemical Industry Press, 2006, 29-30 (in Chinese)
3
Guan Q, Zhang C X, Guo D L. New technique for dynamically controlled low stress non-distortion welding. Transactions of the China Welding Institution , 1994, 15(1): 8-15 (in Chinese)
4
Guan Q. Efforts to eliminate welding buckling distortions - from passive measures to active in-process control. In: Proceeding of the 7th International Symposium of JWS: Today and Tomorrow in Science and Technology of Welding and Joining. Kobe, Japan , 2001
5
Fang H Y. Knowledge of Welded Construction. Beijing: China Machine Press, 2008, 94-95 (in Chinese)
6
Tian X T. Welded Construction. Beijing: China Machine Press, 1982, 29-32 (in Chinese)
