Numerical simulation on stress field of subsection welding of 2219 aluminum alloy flat

来源期刊：中国有色金属学报(英文版)2005年第z2期

论文作者：刘雪松 姬书得 方洪渊

文章页码：39 - 42

Key words：subsection welding； welding sequence； residual stress； numerical simulation

Abstract: Numerical simulation of 2219 aluminum alloy flat under the condition of subsection welding or no subsection welding was analyzed by the double ellipsoidal heat source model. The result shows that the residual tensile stress of subsection welding appears in the weld and nearby areas while the peak value appears in the weld. The subsection welding can greatly increase the low stress area in the weld. Moreover, the contrast of stress between the subsection welding and no subsection welding shows that if the welding sequence, namely that the double ends of the weld are welded first and then the middle part is welded, is adopted in the subsection welding, the peak value of residual tensile stress can be greatly decreased.