东南大学学报（英文版）2017，Vol.33Issue(1)：39-45,7.DOI:10.3969/j.issn.1003-7985.2017.01.007
一种新的基于多因素修正的结构件裂纹扩展预测方法
Estimation of structure crack propagation based on multiple factors correction
摘要
Abstract
By deriving the stress concentration factor of the estimation approach for residual fatigue life,an estimation approach for structure crack propagation based on multiple factors correction is proposed.Then,the quantitative expression among the structure factor,stress ratio,loading type,the manufacture processing factor and the crack propagation is achieved.The proposed approach is implemented in a case study for an instance structure,and the influences of correction factors on the crack propagation are analyzed.Meanwhile,the probabilistic method based on Weibull distribution probability density function is selected to evaluate the precision of the corrected estimation approach,and the probability density of results is calculated by the probability density function.It is shown that the results estimated by the corrected approach is more precise than those estimated by the fracture mechanics,and they are closer to the test data.关键词
预测研究/裂纹扩展/多因素修正/概率密度方程Key words
estimation study/crack propagation/multiple factor correction/probability density function分类
机械制造引用本文复制引用
朱林,贾民平,姜长城,张菀..一种新的基于多因素修正的结构件裂纹扩展预测方法[J].东南大学学报（英文版）,2017,33(1):39-45,7.基金项目
The National Natural Science Foundation of China(No.51675098),Chinese Specialized Research Foundation for Doctoral Program of Higher Education (No.20130092110003),Graduate Student Research Innovation Foundation of Jiangsu Province (No.KYLX15_0059). （No.51675098）
