High Cycle Fatigue Behavior Evaluation of Q235 Steel Based on Energy Dissipation

被引：6
|
作者：
Fan J. [1 ]
机构：
[1] Aircraft Strength Research Institute, AVIC, Xi'an
来源：
Fan, Junling (fanjunling@mail.dlut.edu.cn) | 2018年 / Chinese Mechanical Engineering Society卷 / 54期
关键词：
Damage mechanism; Energy dissipation; Fatigue behavior; High-cycle fatigue;
D O I：
10.3901/JME.2018.06.001
中图分类号：
学科分类号：
摘要：
Using the theories of macro micro mechanics and continuum thermodynamics, the energy dissipation calculation method is derived for high-cycle fatigue evaluation. The local heat diffusion equation is used to create a method for rapid fatigue limit evaluation. This method with definite physical meaning eliminates the arguments on the thermographic method. Fatigue limits by the traditional tests and the present method are compared, and an error of 9.9% is given, showing the accuracy of this method. It is shown that in the process of fatigue when the heat generation rate is equal to the heat dissipation rate, the energy dissipation tends to be an asymptotic value. Therefore, the limiting energy is determined as the product of the energy dissipation and the whole fatigue life, and a method for rapid fatigue life prediction is developed. It is noted that the slope of the predicted S-N curve, with an error of 9.4%, is in good agreement with the traditional result. Consequently, the potential prospect of the present method in rapid fatigue behavior evaluation is presented. © 2018 Journal of Mechanical Engineering.
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页码：1 / 9
页数：8
相关论文
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