Fatigue crack closure: From LCF to small scale yielding

被引：57

作者：

Pippan, R. ^{[1
]}

Grosinger, W. ^{[1
]}

机构：

[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2013年 / 46卷

关键词：

Crack closure; Low cycle fatigue; Small scale yielding; Micro-cracks; Long cracks; WAKE PLASTICITY; PROPAGATION; THRESHOLD; RECONSIDERATION; OVERLOADS; DUCTILE; LENGTH; STRESS; GROWTH; ERROR;

D O I：

10.1016/j.ijfatigue.2012.02.016

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Most of the research on crack closure has been devoted to crack propagation under small scale yielding. In this paper, the effect of different length scale from micro-crack to long cracks and different loading conditions from low cycle fatigue, LCF, to small scale yielding on crack closure are considered. The main focus is on LCF crack closure behaviour which is studied by in situ fatigue experiments in a scanning electron microscope. The results demonstrate the importance of crack closure for the explanation of the LCF behaviour. The change of crack closure from LCF to high cycle fatigue and their consequences for lifetime prediction will be discussed. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：41 / 48

页数：8

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