钛合金焊接件疲劳特性评估的当量K_t法  

Equivalent K_t Method for Evaluating Fatigue Properties of Titanium Alloy Welding Specimens

作　　者：王向明[1] 刘文珽[1] 王忠波[1] 

机构地区：[1]北京航空航天大学飞行器设计与应用力学系

出　　处：《北京航空航天大学学报》2002年第1期102-104,共3页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：针对先进飞机结构广泛采用的钛合金焊接结构 ,提出了描述焊接件疲劳特性的当量理论应力集中系数Kt(Kte)的概念 ;建立了以钛合金材料疲劳性能为基础 ,通过一组谱载下钛合金焊接件疲劳试验来确定Kte的技术途径 .With regard to the Titanium alloy welding structures generally used in advanced aircraft structures,an equivalent theoretical stress concentration coefficient K t (K te ) was introduced to describe the fatigue property of welding specimen. On the basis of the fatigue properties of Titanium alloy specimens,a technological approach used to determine K te is established through fatigue testing for the Titanium alloy welding specimen under a spectrum load. The detailed process determining K te and some useful results are given by taking the TC4 titanium alloy oxy arc welding specimen for example.

关 键 词：钛合金焊接件 疲劳特性 飞机结构 评估 当量Kt法 

分 类 号：V215.5[航空宇航科学与技术—航空宇航推进理论与工程]