A probabilistic method for predicting fatigue life controlled by defects

被引：29

作者：

Todinov, MT

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Dept Met & Mat, Sofia, Bulgaria

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 255卷 / 1-2期

关键词：

fatigue life; defects; fatigue crack occurrence; probabilistic modelling;

D O I：

10.1016/S0921-5093(98)00772-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The probability with which defects become fatigue crack origins is determined, during fatigue tests at a specified stress range. On this basis a probabilistic method is proposed to predict the fatigue life when it is strongly dependent on the fatigue crack initiating defects. In this case the scatter in the fatigue life is due to variations of the size of the initiating defects and the probability with which they initiate fatigue cracks, rather than on variations in fatigue crack initiation or propagation life. A Monte-Carlo simulation was applied to predict the fatigue life of cast aluminium alloys. The model handles fatigue crack initiation from discontinuities and other defects. A method to find the group of defects most detrimental to the fatigue life is also proposed. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：117 / 123

页数：7

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