摘要
应用随机理论与实验数据相结合的方法建立了疲劳裂纹扩展参量与时间关系的随机模型，根据随机模型建立了相应的随机微分方程，求解了有关的统计分布函数，并应用随机模拟方法再现了疲劳裂纹扩展的时间历程。
In order to estimate the statistical variability of the fatigue crack growth,a stochastic model for fatigue crack growth is proposed by means of combining stochastic theory with exper-imental results. A stochastic differential equation is derived from the stochastic model for fatigue crack growth, By using the solution of the stochastic differential equation, some distribution functions related to the fatigue crack growth are derived. Sample function of fatigue crack growth time histories is simulated as random process.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1994年第7期806-811,共6页
Acta Aeronautica et Astronautica Sinica
关键词
航空器
裂纹扩展
疲劳寿命
材料
fatigue(materials),fatigue life-crack propagation,statistical distribution
