钛合金焊接件疲劳寿命估算  

Fatigue Life Evaluation of Titanium Alloy Welding Specimens

作　　者：徐建新[1] 明平伟[1] 王旭东[1] 

机构地区：[1]中国民航大学机电工程学院,天津300300

出　　处：《中国民航学院学报》2006年第5期30-33,共4页Journal of Civil Aviation University of China

基　　金：中国航空工业第一集团公司601研究所与中国民航大学合作项目

摘　　要：基于有限单元法理论,采用ANSYS有限元分析软件,对航空发动机中常用钛合金焊接试件进行应力应变分析,得到了焊接接头的等效应力场和应变场,并确定出试件等效应力集中系数Kf。运用局部应力-应变法对光滑焊接试件估算疲劳寿命,并采用成组试验法对计算结果进行验证和分析。In this paper, the stress and strain of titanium alloy welding specimens often used in aero-engine are analyzed by using the Finite Element Method（FEM）. Then the stress field and the strain field of titanium alloy welded joints are obtained, and the effective stress concentration coefficient （Kf） is determined. The fatigue life of typical titanium alloy welding specimens has been successfully calculated by using local stl＂ess-strain method, and the theoretical results are verified by comparing with the experimental results.

关 键 词：钛合金 焊接 疲劳寿命 有限元 应力 

分 类 号：V215.2[航空宇航科学与技术—航空宇航推进理论与工程]