常用累积损伤理论疲劳寿命估算精度的试验研究  

STUDY ON THE ACCURACY OF FATIGUE LIFE PREDICTIONS BY THE GENERALLY USED DAMAGE ACCMULATION THEORY

作　　者：赵少汴[1] 

机构地区：[1]机械工业部郑州机械研究所，郑州 450052

出　　处：《机械强度》2000年第3期206-209,共4页Journal of Mechanical Strength

摘　　要：　用三种汽车、拖拉机典型零构件，通过模拟其服役载荷的随机疲劳试验，对Ｍｉｎｅｒ法则、修正Ｍｉｎｅｒ法则、Ｍａｎ－ｓｏｎ的双线性损伤理论和Ｃｏｒｔｅｎ－Ｄｏｌａｎ损伤理论的寿命估算精度进行了试验研究。研究结果表明，这４种常用累积损伤理论对这三种零构件的寿命估算都是可用的，而以Ｃｏｒｔｅｎ－Ｄｏｌａｎ损伤理论的寿命估算精度最高。因此，推荐使用Ｃｏｒｔｅｎ－Ｄｏｌａｎ损伤理论进行汽车、拖拉机零构件的寿命估算。本文还对Ｃｏｒｔｅｎ－Ｄｏｌａｎ损伤理论的幂数ｄ和修正Ｍｉｎｅｒ法则的常数ａ进行了探讨。The life prediction accuracy of Miner's rule, modified Miner's rule, Manson's double linear damage theory and Corten-Dolan damage theory are discussed. The study is based upon the random fatigue tests by simulating the service loads with for typical automotive and tractor structure elements. The results of this study show that the three generally used damage accumulation theories are all convenient to the life predictions for the four structure elements and the predicated accuracy by Corten-Dolan damage theory is the highest. Therefore, the Corten-Dolan damage theory is recommended for the fatigue life predictions of automotive and tractor structure elements. In the paper,the power d of Corten-Dolan damage theory and the contant a of malled Miner's rule are also discussed.

关 键 词：随机疲劳试验 累积损伤理论 疲劳寿命估算精度 

分 类 号：O346.2[理学—固体力学] TB114.3[理学—力学]