疲劳过程中的两类随机性  

Two kind of stochastic factor in fatigue process

作　　者：吕文阁[1] 赵葛霄[1] 

机构地区：[1]广东工业大学,广州510090

出　　处：《机械设计与制造》2001年第4期6-7,共2页Machinery Design & Manufacture

摘　　要：分析了疲劳过程中两类随机性因素──内在随机性因素和外在随机性因素在不同载荷条件下在疲劳损伤过程中所起的作用和对疲劳寿命分布所产生的影响。在此基础上，提出了一种估算随机载荷作用下疲劳可靠性的新方法。：Fatigue demage process is investigated by using stochastic process theory. Based on the analysis of effect of intemal stochastic fluctuations and extemal stochastic fluctuations on fatigue process and fatigue life under different loading condition, A new method for the prediction of fatigue reliability under random loading is put froward. Finally, a small sample date of l5Mnvnq is used to verify the adaptability of this method.

关 键 词：疲劳 损伤 随机性 可靠性 

分 类 号：O34[理学—固体力学] TH114[理学—力学]