Fatigue propagation threshold of short cracks under constant amplitude loading

被引：206

作者：

Chapetti, MD ^{[1
]}

机构：

[1] Univ Mar del Plata, CONICET, INTEMA, Mar Del Plata, Argentina

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2003年 / 25卷 / 12期

关键词：

short cracks; fatigue crack growth threshold; non-propagating cracks;

D O I：

10.1016/S0142-1123(03)00065-3

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study a threshold for fatigue crack propagation as a function of crack length is defined from a depth given by the position d of the strongest microstructural barrier to crack propagation, which defines the plain fatigue limit. The material threshold is estimated from the plain fatigue limit Deltasigma(eR), the position d of the strongest microstructural barrier and the threshold for long cracks, DeltaK(thR). The threshold for eight different materials for which experimental results can be obtained from the literature was estimated. Good agreement was observed in all cases. Some quantitative analyses of the fatigue propagation behavior of short cracks are carried out and discussed. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1319 / 1326

页数：8

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