多轴应力应变的一种新的计算方法.pdf

文档介绍：2
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Journal of Mechanical Strength 2005 ,27(1) :117~120
●研究简报●
多轴应力应变的一种新的计算方法
NEW METHOD FOR CALCULATING ELASTO PLASTIC STRAINS AND
STRESSES UNDER MULTIAXIAL LOADING
刘克格 1 阎楚良 1 尚德广 2 张书明 1
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(1. 中国农业机械化科学研究院,北京 100083) (2. 北京工业大学机电学院,北京 100022)
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LIU Ke Ge 1 YAN ChuLiang 1 SHAN G De Guang 2 ZHAN G ShuMing 1
(1. Chinese Academy of Agricultural Mechanization Sciences , Beijing 100083 , China)
(2. College of Mechanical Engineering and Applied Electronics , Beijing University of Technology , Beijing 100022 , China)
摘要计算缺口件缺口处的应力应变方法有多种,其中应用较广的是具有能量观点的 Neuber 法和等效应变能密度
法。通常 Neuber 法过高地估计应力和应变,等效应变能密度法过低地估计应力和应变。通过分析研究,文中引进屈服强
度参数,提出一种新的计算方法。通过对同一构件缺口处的应力应变的计算结果进行比较可知,文中提出的新的计算方
法是合理可行的,有较好的精度。
关键词 Neuber 法等效应变能密度法缺口应力应变
中图分类号 O344. 3
Abstract Many methods that may apply to calculate the strains and stresses of notches have been presented. In generally
Neuber’s rule and equivalent strain energy density( ESED) method were widely used , which have certain physical meaning. Neuber’s
rule tends to overestimate stresses and strains. Contrary to Neuber’s rule ,ESED method usually underestimates stresses and strains. The
authors investigate the problem and put forward a new approach by making use of yield stress. The new method is the same asNeuber’s
rule when the notches are in elastic state ,but in plastic they are differen