内压薄壁圆柱壳电阻凸焊接头疲劳寿命研究  

Research on Fatigue Life of Resistance Projection Welding Joint for Thin-Walled Cylindrical Shell under Internal Pressure

作　　者：朱杰 王海峰[1] ZHU Jie;WANG Haifeng(School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《轻工机械》2024年第3期54-59,共6页Light Industry Machinery

摘　　要：为提高凸焊接头在使用过程中的安全性能,笔者采用有限元法和等效结构应力法,对内压薄壁圆柱壳电阻凸焊接头疲劳寿命预测方法进行了研究。提出了一种考虑预压载荷对圆柱壳形状影响的建模方法,计算了不同预压载荷下的筒体变形和凸焊接头疲劳寿命。研究结果表明薄壁圆柱壳在凸焊接头处的变形对凸焊接头疲劳寿命有显著影响。建议在制造中采取措施减小焊接过程对圆柱壳在开孔区的变形的影响,从而使凸焊接头获得较高的疲劳寿命。In order to improve the safety performance of projection welding joints during use,the finite element method and equivalent structural stress method were used to study the fatigue life prediction method for resistance projection welding joints of thin-walled cylindrical shells under internal pressure.A modeling method considering the influence of preloading on the shape of cylindrical shells was proposed,and the deformation of the cylinder and the fatigue life of projection welded joints under different preloading were calculated.The research results show that the deformation of thin-walled cylindrical shells at the projection welding joint has a significant impact on the fatigue life of the projection welding joint.It is recommended that measures shoud be taken to reduce the deformation of the cylindrical shell in the opening during the welding process,so as to obtain a higher fatigue life for the projection welded joint.

关 键 词：凸焊 薄壁圆柱壳 焊接变形 等效结构应力法 有限元分析 

分 类 号：TG404[金属学及工艺—焊接] TH164[机械工程—机械制造及自动化]