张泰华, 孟宪红. 推导材料不同$K_t $中值疲劳曲线的损伤力学方法[J]. 力学与实践, 2006, 28(5). DOI: 10.6052/1000-0992-2005-447
引用本文: 张泰华, 孟宪红. 推导材料不同$K_t $中值疲劳曲线的损伤力学方法[J]. 力学与实践, 2006, 28(5). DOI: 10.6052/1000-0992-2005-447
THE MEAN FATIGUE LIFE CURVES FOR DIFFERENT COEFFICIENTS OF STRESS CONCENTRATION BASED ON DAMAGE MECHANICS[J]. MECHANICS IN ENGINEERING, 2006, 28(5). DOI: 10.6052/1000-0992-2005-447
Citation: THE MEAN FATIGUE LIFE CURVES FOR DIFFERENT COEFFICIENTS OF STRESS CONCENTRATION BASED ON DAMAGE MECHANICS[J]. MECHANICS IN ENGINEERING, 2006, 28(5). DOI: 10.6052/1000-0992-2005-447

推导材料不同K_t 中值疲劳曲线的损伤力学方法

THE MEAN FATIGUE LIFE CURVES FOR DIFFERENT COEFFICIENTS OF STRESS CONCENTRATION BASED ON DAMAGE MECHANICS

  • 摘要: 从损伤力学出发,得到材料的中值疲劳曲线表达式. 通过分析,得到了影响材料S-N曲线的材质参数及其相互关系. 通过升降法和成组法试验,获得K_t=1.0时对应材料的中值疲劳曲线, 即材质参数. 在此基础上,只需通过升降法得到任意应力集中系数K_t下的疲劳极限,即可得到该应力集中下对应的中值疲劳曲线.

     

    Abstract: The mean fatigue life curves of a materialcan be obtained from damage mechanics. The materialparameters that affect the S-N curve and the relationship betweenthem are obtained. Themean fatigue life curves, namely, the material parameters corresponding toK_t=1.0, are obtained by using the up-down method and the groupfatigue test. One needsonly to use the up-down fatigue test to get the fatigue limit underany coefficient of stress concentration K_t, then, we can get the meanfatigue life curves corresponding to the stressconcentration.

     

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