摘要
本文给出了一个新的针对应力控制接触疲劳问题的寿命预测模型。在该模型中，选用Ｍｉｓｅｓ等效应力作为接触疲劳应力控制参量；引进了非零的接触疲劳应力强度值，根据损伤力学理论，分析了接触疲劳应力强度值与基体材料性质，第二相夹杂之间的关系，同时考虑了表面起裂和亚表面起裂两种失效形式，并将对这两种失效形式的寿命预测统一到一个公式中，引进一个与油膜系数Λ有关的系数ｆ（Λ），来表征润滑程度对接触疲劳寿命的影响。应用该模型来预测一些实验的接触疲劳寿命，计算值与实测值吻合很好。
This paper describes a new model for the prediction of contact fatigue life controlled by stresses. Mieses equivalent stress is chosed as a stress-related fatigue criterion. A non-zero contact fatigue limit is used. Depended on defect mechanics, relation between fatigue limit and material or inclusion is analysed. Two failure forms initiated in the subsurface or surface are considered, and prediction of contact fatigue life to the two failure forms is combined to a formula. A cofficient f(Λ) related to oil film cofficient Λ is used to express lubrication's influence upon contact fatigue life. The model is used to predict smme experimential contact fatigue lives. Predicted results fit experimental results well.
出处
《工程力学》
EI
CSCD
1994年第3期47-54,共8页
Engineering Mechanics
关键词
接触疲劳
寿命预测
疲劳试验
contact fatigue, prediction of life, defect factor
