双轴压载荷下T形节点焊趾处应力强度因子研究  

Study on Stress Intensity Factor of T-joint Weld Toe Under Biaxial Compressive Loads

作　　者：严仁军[1,2] 张红梅[2] 辛辰[3] 

机构地区：[1]高性能船舶技术教育部重点实验室(武汉理工大学),武汉430063 [2]武汉理工大学交通学院,武汉430063 [3]武昌船舶重工有限责任公司,武汉430060

出　　处：《武汉理工大学学报（交通科学与工程版）》2016年第4期574-579,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：为了分析T形焊接接头焊趾处疲劳裂纹在双轴循环压载荷引起的复杂应力场中的扩展情况,采用有限元计算和经验公式相结合的方法,提出了改进的焊趾处应力强度因子的计算公式.基于双参数法给出了用于分析T形试件焊趾处裂纹扩展情况的疲劳裂纹扩展模型,并与试件的试验数据进行了对比,验证了所提出的T形试件焊趾处疲劳裂纹应力强度因子KT计算公式的适用性.To rationally analyse the weld toe fatigue crack growth of T-welded joint under the complex stress field induced by biaxial cyclic compressive loading, a combined method of finite element method and empirical formula method is used in this paper. A modified formula of calculating weld toe stress intensity factor and a two-parameter fatigue crack growth formula are proposed, which can be used to analyse the weld toe fatigue crack propagation life of T-welded joint under complex stress field. Com- pared to the experimental data, this stress intensity factor formula of weld toe in T-welded joint is ra- tional and effective.

关 键 词：双轴循环压载荷 应力强度因子 有限元 

分 类 号：U661.43[交通运输工程—船舶及航道工程]