| 多处损伤的疲劳裂纹扩展分析方法研究 |
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| 引用本文： | 吉凤贤,徐晓飞,姚卫星.多处损伤的疲劳裂纹扩展分析方法研究[J].机械强度,2003,25(3):264-266. |
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| 作者姓名： | 吉凤贤 徐晓飞 姚卫星 |
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| 作者单位： | 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 |
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| 基金项目： | 航空科学基金资助项目 (0 0B52 0 1 5)~~ |
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| 摘 要： | 多处损伤(multiple site damage，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，寿命预测结果与试验结果吻合很好。
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| 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 |
| 修稿时间： | 2002年1月10日 |
STUDY ON ANALYSIS METHOD OF MULTIPLE SITE DAMAGE FATIGUE CRACK GROWTH |
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| JI Fengxian,XU Xiaofei,YAO Weixing.STUDY ON ANALYSIS METHOD OF MULTIPLE SITE DAMAGE FATIGUE CRACK GROWTH[J].Journal of Mechanical Strength,2003,25(3):264-266. |
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| Authors: | JI Fengxian XU Xiaofei YAO Weixing |
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| Affiliation: | JI Fengxian XU Xiaofei YAO Weixing |
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| Abstract: | 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. |
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| Keywords: | Multiple site damage(MSD) Crack growth Life prediction SIF combination model Fracture criterion Crack link up criterion |
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