Effects of surface deformation and crack closure on fatigue crack propagation after overloading and underloading

被引：65

作者：

Makabe, C ^{[1
]}

Purnowidodo, A

McEvily, AJ

机构：

[1] Univ Ryukyus, Dept Mech Syst Engn, Nishihara, Okinawa 9030213, Japan

[2] Univ Ryukyus, Grad Sch, Nishihara, Okinawa 9030213, Japan

[3] Univ Connecticut, Dept Met, Storrs, CT 06269 USA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2004年 / 26卷 / 12期

关键词：

fatigue crack propagation; overload; stress ratio; retardation; acceleration; blunting of crack tips; bulging; residual stress;

D O I：

10.1016/j.ijfatigue.2004.03.017

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In the case of a negative baseline stress ratio, the fatigue crack growth rate can actually accelerate after a tensile overload. This crack propagation behavior is related to the local bulging of the specimen in the thickness direction during compression and the resultant tensile residual stress distribution at the crack tip. In the present investigation, the effects of a single tensile overload as well as the effects of a tensile overload followed immediately by a compressive underload on subsequent fatigue crack growth were investigated. The extent of crack opening displacement influences the magnitude of residual stress as well as the crack-tip opening level, and consequently, the subsequent rate of fatigue crack propagation. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1341 / 1348

页数：8

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