The influence of grain size variation on metal fatigue

被引：73

作者：

Andersson, J ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Math Stat, SE-41296 Gothenburg, Sweden

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2005年 / 27卷 / 08期

关键词：

short crack; grain structure; Voronoi tessellation;

D O I：

10.1016/j.ijfatigue.2004.11.007

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 [机械工程];

摘要：

The aim of the present study is to investigate the influence of the variation of metal grain sizes on fatigue lives. The grain structure is simulated from a Poisson-Voronoi model and the short crack growth model of Navarro and de los Rios is applied. The resulting fatigue life decreased with increasing component size, probably reflecting the fact that with increasing number of grains there is a larger probability of finding a large grain where the crack starts. The standard deviation of the logarithm of the lives was in the order of 0.2-0.4, i.e. the variation in grain size explains only part of the observed variance in real fatigue data. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：847 / 852

页数：6

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