| 预腐蚀条件下多裂纹结构的概率损伤容限评定 |
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| 引用本文： | 张建宇,赵丽滨,费斌军.预腐蚀条件下多裂纹结构的概率损伤容限评定[J].北京航空航天大学学报,1999,25(5):550-553. |
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| 作者姓名： | 张建宇 赵丽滨 费斌军 |
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| 作者单位： | 北京航空航天大学 飞行器设计与应用力学系 |
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| 摘 要： | 为了对恶劣停放环境下的飞机结构进行可靠性分析,利用Wei-Landes线性假设建立预腐蚀条件下的单裂纹扩展随机模型,结合含多裂纹结构的裂纹扩展随机模型,建立了预腐蚀条件下含多裂纹结构的概率损伤容限评定方法.运用于结构的可靠性评定,给出了寿命-可靠度曲线.通过对不同飞行使用强度下的可靠度曲线的比较,得出了飞行使用强度与预腐蚀对裂纹扩展寿命的影响关系.
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| 关 键 词： | 腐蚀断裂 结构可靠性 结构寿命 预腐蚀 多裂纹结构 损伤容限 |
| 收稿时间： | 1998-04-16 |
| 修稿时间： | : 1998-04-16 |
Probability Damage Tolerance Evaluation Method for Multi-Cracked Structure under Pre-corrosion |
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| Zhang Jianyu,Zhao Libin,Fei Binjun.Probability Damage Tolerance Evaluation Method for Multi-Cracked Structure under Pre-corrosion[J].Journal of Beijing University of Aeronautics and Astronautics,1999,25(5):550-553. |
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| Authors: | Zhang Jianyu Zhao Libin Fei Binjun |
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| Institution: | Beijing University of Aeronautics and Astronautics,Dept. of Flight Vehicle Design and Applied Mechanics |
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| Abstract: | For analyzing the aircraft structural reliability under bad parking conditions, probability damage tolerance evaluation method is established. This method is used to analyze the reliability of multi crack structure considering the influence of pre corrosion. This method comprehensively surveys the existed single crack propagation random model under pre corrosion conditions using Wei Landes linear theory and the crack propagation random model with multi crack structure. Finally, the life reliability curves are given in an illustrative example using the method as indicated above. Comparing the reliability curves of different SUS(Service Usage Severity), the influence of pre corrosion and SUS to crack propagation life can be obtained. |
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| Keywords: | corrosion fracture structural reliability structural life time pre corrosion multi crack structure damage tolerance |
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