航空学报 > 2007, Vol. 28 Issue (4): 858-863

腐蚀条件下使用寿命评定的功能失效概率控制方法

贺小帆,刘文珽   

  1. 北京航空航天大学 航空科学与工程学院
  • 收稿日期:2006-06-28 修回日期:2007-04-24 出版日期:2007-07-10 发布日期:2007-07-10
  • 通讯作者: 贺小帆

Failure Probability Control Approach for Service Life Evaluation in Corrosive Environment

HE Xiao-fan,LIU Wen-ting   

  1. School of Aeronautical Science and Engineering,Beijing University of Aeronautics and Astronautics
  • Received:2006-06-28 Revised:2007-04-24 Online:2007-07-10 Published:2007-07-10
  • Contact: HE Xiaofan

摘要:

腐蚀环境会加速裂纹扩展、改变结构原始疲劳质量,为进行腐蚀条件下飞机结构经济寿命评定,采用腐蚀条件下概率断裂力学方法和裂纹萌生方法对结构细节裂纹超越概率进行分析,采用二项分布得到指定使用时间下飞机结构关键件、单机和机群的功能失效概率,提出了腐蚀条件下的耐久性分析的功能失效概率控制方法,并对某型飞机结构进行了腐蚀条件下的经济寿命评定。

关键词: 腐蚀, 使用寿命, 失效概率, 耐久性, 经济寿命, 飞机结构

Abstract:

Corrosion can accelerate the crack growth and weaken the initial fatigue quality(IFQ). To evaluate the economic life for aircraft structure in corrosive environment, the crack exceed probability is analyzed by using the probabilistic fracture mechanics approach(PFMA) and crack initiation approach(CIA) in corrosive environment, and the failure probabilities for the critical component, single aircraft and fleets are obtained by assuming the crack exceed number follows the binomial distribution.

Key words: corrosion,  , service , life,  , failure , probability,  , durability,  , economic , life,  , aircraft , structure

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