熔修工艺对T形板复合结构接头应力场影响的数值分析  

Numerical analysis of influence of the stress field by using melting dressing in T plate composite joint

作　　者：张可荣[1] 郭桂芳[1] 高屹[1] 周章金[1] 张建勋[2] 

机构地区：[1]西藏民族学院信息工程学院,陕西咸阳712082 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《焊接技术》2013年第11期20-23,4,共4页Welding Technology

基　　金：西藏自治区自然科学基金项目(12KJZRYMY02);西藏民族学院"青年学人培育计划"资助项目(12myQP09)

摘　　要：基于ANSYS有限元软件,采用局部细化的三维数值模型,针对厚度达40 mm的T形板复合结构接头,分析了焊后熔修过程对接头应力数值、分布状态及熔合线处焊缝形貌的影响规律。熔修过程分别施加于壳板与贯穿件间双面V形坡口各熔合线处及T形肋板与贯穿件间堆焊层处。通过对两区域Mises等效应力峰值及沿垂直焊缝方向应力分布的比较,可知焊后熔修过程在一定程度上可降低接头熔合线处残余应力峰值,改善熔合线处应力梯度状态,并可通过改变熔合线处焊缝形貌而提高接头抗裂性能。Based on ANSYS finite element software, the value and distribution of stress as well as the influence of weld profile on fusion line of T-joint with thickness of 40 mm by using melting dressing after welding was analyzed. The melting dressing was applied to the fusion line on double V groove between the shell and the penetration as well as the surfacing layer between the T-plate and the penetration. The results of calculation confirmed that the stress value and gradient in weld were reduced effectively and the crack resistance of joint was improved remarkably by using melting dressing after welding.

关 键 词：焊后熔修 环焊缝 堆焊层 应力梯度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]