摘要
提出了一种新的概率损伤容限分析模型,它由a-t随机裂纹扩展模型和基于寿命失效准则的破坏概率可靠性分析模型组成。该模型弥补了现有概率损伤容限分析模型的不足,并便于工程应用。
A new model of probability damege tolerance analysis has been presented. It is composed of 'a-t' random crack propagating model and probability reliability analysis model which are based on the failure life. The former establishes distribution function of life for arbitrary crack length by using reasonable 'a-t' relation and statistically analysing life data for arbitrary given crack length. The latter indicates that safe reliability R of crack population corresponding to given life t * is probability of random critical life exceeding t+. This new model can remedy the weakness of previous analysis model of probability damage tolerance which is composed of 'da/dt' random process model and 'a-ac' (or K-KC) reliability interference model, and furthermore, it is very convenient to engineering use.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1993年第3期A134-A139,共6页
Acta Aeronautica et Astronautica Sinica
关键词
概率损伤容限
裂纹扩展
可靠性
probability damage tolerance analysis, random crack propagation, reliability
