摘要
基于扩展有限元方法研究钛合金传统机加接头耳片与含预置非焊合区的层合接头耳片结构在拉-拉疲劳荷载作用下的裂纹扩展特性,揭示螺栓孔在受挤压情况下非焊合区对钛合金典型连接结构疲劳裂纹扩展的抑制作用,并通过试验验证扩展有限元方法对钛合金典型连接耳片结构裂纹扩展特性分析的有效性。
The fatigue crack growth characteristics of the traditional lug and diffusion bonded lug with localized non-welded area of TC4 titanium-alloy are studied, and the simulation techniques based on extended finite element method（XFEM） under tension-tension cyclic loading are used, in order to reveal the inhibitory effect of non-welded area on crack growth when the bolt hole is in the extrusion. The comparisons of the numerical results and the experimental results show that the extended finite element method（XFEM） is an effective numerical method for the fatigue crack growth characteristics analysis.
出处
《航空制造技术》
2017年第18期66-69,共4页
Aeronautical Manufacturing Technology
基金
国家重点基础发展(973)计划项目(2011CB61XXXX)
大连理工大学工业装备结构分析国家重点实验室开放课题(GZ15106)
关键词
传统机加耳片
钛合金层合耳片
非焊合区
疲劳裂纹扩展
扩展有限元方法
Traditional lug
Diffusion bonded lug of titanium alloy
Non-welded area
Fatigue crack growth
Extended finite element method
作者简介
通讯作者：肖山,工程师,研究方向为飞行器设计、钛合金结构断裂分析和结构优化设计,E-mail：xiaoshanaaa@163.com.
