金属材料多轴疲劳累积损伤理论研究进展  

STATE-OF-THE-ART OF THE ACCUMULATIVE DAMAGE RULES UNDER MULTIAXIAL VARIABLE FATIGUE LOADINGS FOR METAL MATERIALS

作　　者：夏天翔[1] 姚卫星[2] 嵇应凤 

机构地区：[1]飞行器先进设计技术国防重点学科实验室,南京航空航天大学,南京210016 [2]机械结构力学及控制国家重点实验室,南京航空航天大学,南京210016

出　　处：《机械强度》2014年第4期605-613,共9页Journal of Mechanical Strength

基　　金：国家自然科学基金资助项目(51275241);机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题资助(0213G02);江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0175);南京航空航天大学博士学位论文创新与创优基金资助项目(BCXJ13-02);中央高校基本科研业务费专项资金资助项目~~

摘　　要：考虑到多轴载荷下累积损伤规律与单轴情况的不同,将现有的金属材料多轴疲劳累积损伤理论分为以下四类:(a)不分方向的线性累积模型;(b)不分方向的非线性累积模型;(c)分方向的线性累积模型;(d)分方向的非线性累积模型。首先对以上4类多轴疲劳累积损伤理论分别进行了回顾,并着重介绍了近年来的最新进展。接着,收集整理了目前使用这些模型处理过的金属材料多轴变幅载荷试验,给出了这些试验的载荷谱型和数据点数,并统计了各模型对各试验的预测准确率。最后,根据各类模型的准确率对它们的适用范围、计算效果进行了对比分析与讨论。Taking the differences between the accumulative damage rules under muhiaxial and uniaxial variable fatigue loadings into account, the multiaxial fatigue accumulative damage theories for metal materials were divided into the following four categories： （a） the directional linear models; （b） the directional nonlinear models; （c） the non-directional linear models; （d） the non-directional nonlinear models. In this paper, the above four categories were reviewed respectively, and the latest advances were emphatically introduced. Besides, the muhiaxial variable loading tests which are processed by the above models were collected. The types of variable loadings and the amount of data samples were listed, and the accuracy rate of each model was calculated. Finally, the applicable scopes and application effects of the above four kinds of multiaxial accumulative damage rules were compared and discussed according to the accuracy rate.

关 键 词：金属材料 多轴疲劳 累积损伤 线性与非线性 不分方向与分方向 变幅载荷试验 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程] TG14[一般工业技术—材料科学与工程]