应用局部法预测焊接接头动态断裂性能  

Investigation on Dynamic Fracture Behavior for Welded Joints Based on Local Approach

作　　者：荆洪阳[1] 张国尚[1] 王东坡[1] 霍立兴[1] 张玉凤[1] 

机构地区：[1]天津大学材料学院

出　　处：《中国机械工程》2003年第15期1336-1338,共3页China Mechanical Engineering

基　　金：国家自然科学基金资助项目 ( 5 0 2 75 10 7);霍英东青年教师科研基金资助项目 ( 810 45)

摘　　要：在不同温度、不同加载速率下进行了典型钢结构用钢拉伸试验 ,采用能综合反映加载速率和高加载速率下材料温升的 R参量来描述材料的本构关系。通过理论分析和试验研究 ,讨论了加载速率和温度对钢结构用钢及其焊接接头断裂行为的影响 ,采用基于概率断裂力学的局部法 。Tension tests were conducted at different temperatures and loading rates for a typical welded structure steel and its welded joint. It is found that the effects of the loading rate and temperature rising induced by the high loading rate on material constituent can be described by the R-parameter. The effects of the loading rate and the temperature on the fracture toughness were analyzed also, the fracture behavior at the dynamic loading was predicted successfully by the testing results at static loading based on the local approach.

关 键 词：加载速率 断裂韧度 局部法 焊接接头 

分 类 号：TH404[机械工程—机械制造及自动化]