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The welding process of 5A06 aluminum alloy cylinder longitudinal weld with 5mm thickness is simulated by finite element software. Distribution on the cylinder for residual stress field was described. Experiments were performed to verify the residual stress. Using loading the tensile stress is applied in the cylinder, and it generates tensile plastic deformation. So it partially offsets compressive deformation of weld and its vicinity. This method is put forward to control the welding distortion and reduce residual stress. The results show that this method can control longitudinal shrinkage and angular distortion of cylinder effectively.

Simulation of Welding Distortion under Pre-stress Based on Cylinder Longitudinal Weld