一、前言快速而准确地判断汽车零部件的疲劳寿命对于提高汽车产品质量,为产品设计提供正确的、科学的依据以及加快研制过程、缩短新产品的定型周期等方面部具有十分重要的作用,是广大汽车设计和试验人员所十分关注的问题。用累积损伤理论来预估零部件的疲劳寿命固然是一种比较好的方法,且国外对此做了大量的试验研究工作,但由于至今对疲劳现象的本质还不完全清楚,因此未能建立起一个既有 I. Foreword The quick and accurate judgment of the fatigue life of automobile parts plays an important role in improving the quality of automobile products, providing the correct and scientific basis for product design, speeding up the development process and shortening the cycle time of fixing new products. Is the majority of car design and test personnel are very concerned about the issue. Using the theory of cumulative damage to predict the fatigue life of components is certainly a good method, and a large number of foreign countries have done a lot of experimental research, but so far the nature of the phenomenon of fatigue is not yet fully understood, and therefore failed to establish Play a both