非均匀焊接接头的力学建模与断裂分析  

Mechanical Modeling and Fracture Analysis for a Non-homogeneous Weldment

作　　者：李永东[1] 张洪才[1] 谭伟[1] 张男[1] 

机构地区：[1]装甲兵工程学院机械工程系 装甲兵工程学院装备再制造工程系 装甲兵工程学院基础部

出　　处：《装甲兵工程学院学报》2008年第3期81-85,共5页Journal of Academy of Armored Force Engineering

基　　金：国家自然科学基金资助项目(50574097)

摘　　要：建立了非均匀焊接接头"4区连接"的新模型,并利用积分变换-奇异积分方程的方法,研究了焊缝区的反平面断裂问题。数值计算表明:增大界面区的刚度或者适当地增大焊缝区、热影响区和界面区的宽度都有利于降低焊缝区裂纹的应力强度因子;相对于高匹配情形而言,低匹配焊接接头焊缝区的抗断裂能力明显较高。A new four-zone model is established for a non-homogeneous weldment. The methods of integral transform and singular integral equation are employed to solve the problem of an anti-plane crack located in the weld metal interfaces. It is indicated by numerical computation that to enhance the stiffness of the interfacial zone and to increase the sizes of the weld metal, the heat affected zone and the interfacial zone are all beneficial to the reduction of the stress intensity factor of the weld-metal crack.The ...

关 键 词：非均匀焊接接头 界面区 焊缝区 匹配因子 应力强度因子 

分 类 号：TG407[金属学及工艺—焊接]