不同焊脚尺寸对T形接头变形及残余应力的影响  

Effect of different fillet weld leg sizes on deformation and residual stress of T-joint

作　　者：李玉生 房元斌 LI Yusheng;FANG Yuanbin(Military Representative of the Ministry of Naval Equipment in Huludao,Huludao 125004,Liaoning pro.,China;Shanghai Electric Appliance Research Institute(Group)Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]海装驻葫芦岛地区军事代表室,辽宁葫芦岛125004 [2]上海电器科学研究所(集团)有限公司,上海200063

出　　处：《焊接技术》2022年第12期32-35,I0008,共5页Welding Technology

摘　　要：不同焊脚尺寸影响结构件焊接变形和残余应力分布,对实际工程意义较大。文中借助焊接数值模拟手段,对T形接头的焊接过程进行分析,获得了接头焊后变形和残余应力。同时,结合盲孔法试验,验证有限元模型的正确性和有效性。结果表明:Z_(1)×Z_(2)=9 mm×9 mm方案焊后总变形量和等效残余应力峰值最小,Z_(1)×Z_(2)=8 mm×10 mm方案焊后总变形量最大;Z_(1)×Z_(2)=10 mm×8 mm方案纵向和横向残余应力峰值最大。纵向和横向残余应力仿真结果与试验测量结果相对误差最大分别为8.82%和8.43%,满足工程应用的要求。该研究为焊脚尺寸控制和残余应力优化提供指导。Different fillet weld leg sizes affect the welding deformation and residual stress distribution of structural parts,which is of great significance to practical engineering.In this paper,the welding process of T-joint was analyzed by means of welding numerical simulation,and the post welding deformation and residual stress of the joint were obtained.At the same time,the correctness and effectiveness of the finite element model were verified by blind hole test.The results showed that Z_(1)×Z_(2)=9 mm×9 mm scheme had the minimum total deformation and equivalent residual stress peak value after welding,and Z_(1)×Z_(2)=8 mm×10 mm scheme had the maximum total deformation after welding,Z_(1)×Z_(2)=10 mm×8 mm scheme had the maximum peak value of longitudinal and transverse residual stress.The maximum errors between the longitudinal and transverse residual stress simulation results and the test results were 8.82% and 8.43%respectively,which met the requirements of engineering application.The research provided guidance for the control of fillet weld leg size and the optimization of residual stress.

关 键 词：焊脚尺寸 焊接变形 残余应力 数值模拟 

分 类 号：TG404[金属学及工艺—焊接]