摘要
通过对Weibull分布、正态分布、指数分布等常用概率模型函数的中值疲劳寿命和高可靠度疲劳寿命关系的分析,建立了应力疲劳寿命可靠性通用表达式。指出疲劳寿命服从各常用分布的可靠性公式都可看作应力疲劳寿命通用公式的特例。基于概率模型分布函数的矩法理论,提出了适用于5种常用概率模型分布的应力疲劳寿命可靠性曲线分析方法。应用基于矩法的应力疲劳寿命可靠性曲线分析方法,获得了42CrMo硬齿面齿轮轮齿弯曲疲劳试验寿命数据的中值疲劳寿命和高可靠度疲劳寿命曲线方程。
The general model of stress fatigue life reliability was proposed by analyzing correlations between the median and high reliability fatigue life about several kinds of probability distribution functions,such as Weibull Distribution(WD),Normal Distribution(ND),Exponential Distribution(ED),etc.Under the condition that fatigue life obeys a probability distribution,this reliability formula is a speciality of the general formulas.Based on moment method of probability distribution functions,stress fatigue life reliability curve analysis suitable for five kinds of probability distributions were proposed.The median and high reliability fatigue life curve equations for 42CrMo hardened gear-tooth bending fatigue life data were estimated by means of stress fatigue life reliability curve analysis.
出处
《应用力学学报》
CAS
CSCD
北大核心
2009年第1期186-189,221,共4页
Chinese Journal of Applied Mechanics
关键词
可靠性
应力疲劳
概率模型
疲劳寿命
矩法理论
reliability,stress fatigue,probability distribution,fatigue life,moment method
