裂纹位置对焊接接头结构力学行为的影响
2020-11-10
作者：孙剑伟1，孙建国2，王帅3
单位：1西安航空职业技术学院；2北京航空航天大学；3西安科技大学
摘要：借助有限元数值模拟方法分析了不同界面位置处应力腐蚀裂纹裂尖力学特性。结果表明：堆焊层是容易失效的薄弱部位；当界面位置施加载荷超过工作载荷时，裂尖应力反而随载荷的增加而降低，这与材料内部的加工硬化有关；其结构完整性的准确分析和评定对保障核电设备的安全可靠性具有重要意义。
关键词：异种金属焊接接头；应力；应变；有限元
中图分类号：TG407；TH161；O346.1文献标志码：ADOI：10.3969/j.issn.1000-7008.2020.10.017
Effect of Crack Location on Mechanical Behavior of Welded Joints
Sun Jianwei，Sun Jianguo，Wang Shuai
Abstract:The mechanical properties of stress corrosion crack tip at different interface locations are analyzed by means of finite element numerical simulation.The results show that the surfacing layer is a weak part that is easy to fail.When the applied load exceeds the working load at the interface position，the crack tip stress decreases with the increasing of the load，which is related to the work hardening inside the material and the accurate analysis and evaluation of its structural integrity is of great significance to ensure the safety and reliability of nuclear power equipment.
Keywords:dissimilar metal welds；stress；strain；finite element