多轴高周疲劳失效准则的对比分析  

Comparative study of multiaxial high-cycle fatigue-prediction criteria

作　　者：时新红[1] 鲍蕊[1] 张建宇[1] 费斌军[1] 

机构地区：[1]北京航空航天大学固体力学研究所,北京100191

出　　处：《航空动力学报》2008年第11期2007-2015,共9页Journal of Aerospace Power

摘　　要：采用多种材料、多种加载方式的数据对多轴高周疲劳中比较常用的6个失效准则进行了对比分析.选取的准则涵盖目前研究的各个方面,包括等效应力准则、应力不变量准则和临界面应力准则;选用的数据包括合金钢、低碳钢、铝合金和铸铁等10种金属材料;加载方式包括比例加载和非比例加载;对比方式包括对同种材料不同准则之间的横向比较和同一准则对不同材料的纵向比较.对比分析的结果表明,6种准则对于低碳钢及合金钢材料的预测结果优于其它材料;比例加载的预测结果优于非比例加载;预测结果较满意的是Papadopoulos准则、Susmel准则和Liu准则.此外,6种准则对于铸铁的预测结果均不理想.Six common fatigue prediction criteria for muhiaxial high-cycle fatigue analy sis were analyzed with several materials and loading data. The selected criteria cover： equivalent stress criteria, stress invariant criteria and critical plane stress criteria in current investigations. The experimental data covered 10 kinds of metal materials, including alloy steel, low carbon steel and aluminum alloy and cast iron, under proportional and non proportional loading conditions respectively. The analytical results show that, the predicted results for low carbon steel and alloy steel are better than that for other materials, and the predicted result for proportional loading is better than that for non-proportional loading. Papadopoulos criterion, Susmel criterion and Liu criterion show better prediction capability than the other three criteria. However, the prediction results of all six criteria for cast-iron materials are dissatisfactory.

关 键 词：压气机叶片 多轴疲劳 高周疲劳 等效应力准则 应力不变量准则 临界面应力准则 

分 类 号：O346.2[理学—固体力学]