几种疲劳寿命预测方法的探讨及评价  

ON ASSESSMENT OF SEVERAL FATIGUE LIFE PREDICTION METHODS

作　　者：张国庆[1,2] 王成焘[3] 徐滨士[4] 

机构地区：[1]台州职业技术学院机电一体化研究所,台州318000 [2]浙江宝石控股(集团)有限公司,台州318000 [3]上海交通大学生命质量与机械工程研究所,上海200030 [4]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《机械强度》2011年第3期469-474,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金重点资助项目(50235030)~~

摘　　要：回顾和总结疲劳寿命预测的主要方法和模型,根据试验结果和有关的文献对各方法和模型进行探讨和评价。Miner法则的最大优点是其方法及理念适合于所有的结构,但是其预测数据比较分散,缺乏精度,应用受到一定的限制。在一定条件下,相对Miner法则预测方法的精确度比较高。局部应变法本身已考虑材料非线性,这是其优于Miner法之处。Willenborg和Wheeler模型是比较初级的。裂纹扩展预测法还有很多问题难以解决,比如裂纹闭合的三维特性等。文中所述方法均有其有效性和局限性,要具体问题具体分析,正确选用不同的方法。The main fatigue life prediction methods and models were reviewed and evaluated according to the relevant literatures and testing results. The biggest advantage of Miner rule is its methodology and philosophy for all of the structure,but its forecasts are dispersed and lack of precision,which limits its application.The relative Miner rule prediction accuracy is relatively high under certain conditions.Local strain method is already considering material nonlinearity,this method outperforms the Miner rule.Willenborg and Wheeler model are still in initial stage.It is difficult for crack propagation prediction method to solve many problems,such as three-dimensional crack closure characteristics.All methods described here both have their validities and limitations.So a correct method should be selected to meet the requirements of specific issues.

关 键 词：疲劳 寿命预测 评价 

分 类 号：O346.2[理学—固体力学] TH114[理学—力学]