多处损伤的疲劳裂纹扩展分析方法研究  

Study on analysis method of multiple site damage fatigue crack growth

作　　者：吉凤贤[1] 徐晓飞 姚卫星[1] 

机构地区：[1]南京航空航天大学飞行器系,南京210016 [2]洪都航空工业集团公司,南昌330024

出　　处：《机械强度》2003年第3期264-266,共3页Journal of Mechanical Strength

基　　金：航空科学基金资助项目 (0 0B52 0 1 5)~~

摘　　要：多处损伤 (multiplesitedamage ,MSD)是影响老龄飞机结构完整性的重要因素之一。文中以线弹性断裂力学为基础 ,将应力强度因子组合模型、裂纹连通准则、断裂准则以及MSD扩展中相关性处理综合在一起 ,建立一种等幅载荷谱下MSD裂纹扩展分析方法 ,并用所编程序对三种典型MSD模式的扩展与断裂过程进行计算分析。结果表明 。Multiple site damage (MSD) is one of important factors which affect structure integrity of aging aircrafts. Based on linear elastic fracture mechanics, an analysis method for MSD crack growth under constant amplitude cyclic loading is established, in which stress strength factor combination model, crack link up criterion, fracture criterion and coherence treatment in MSD evolution are integrated. The MSD growth process and final fracture for three typical MSD models are predicted by the codes compiled by authors, and shows that the analysis results have good coherence with the experimental results.

关 键 词：多处损伤 裂纹扩展 寿命预测 组合模型 断裂准则 飞机结构 

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] O346.2[理学—固体力学]