多轴低周疲劳寿命预测方法研究  

The Research of Fatigue Life Prediction of Multiaxial Low-cycle

作　　者：王永[1] 孙伟[1] 

机构地区：[1]兰州工业高等专科学校机械工程系,甘肃兰州730050

出　　处：《兰州工业高等专科学校学报》2008年第2期13-16,共4页Journal of Lanzhou Higher Polytechnical College

摘　　要：针对近年来的疲劳研究现状进行了初步分析,详细评述了多轴比例、非比例、常幅、变幅加载下低周疲劳寿命四种估算方法:临界平面法、等效应变法、能量法和临界面应变能密度法.对一些模型的应用范围和预测能力进行了讨论,并对今后的研究工作提出了建议.Recent development of muhiaxial low - cycle fatigue is preliminary summarized in the paper. Present multiaxial low- cyclic fatigue life damage approaches are classified into four methods： equivalent strain, plastic work, critical plane and critical - plan strain energy density approaches under proportional, nonproportional, constant amplitude and nonconstant amplitude loading. The applicability limit and prediction ability of these models are discussed, and some suggestions are made for future research.

关 键 词：多轴低周疲劳 低周疲劳 疲劳寿命预测 非比例加载 

分 类 号：TP302.3[自动化与计算机技术—计算机系统结构]