Reduction of mode I fatigue crack growth rate due to occasional mode II loading

被引：20

作者：

Dahlin, P ^{[1
]}

Olsson, M ^{[1
]}

机构：

[1] Royal Inst Technol, KTH, Dept Solid Mech, SE-10044 Stockholm, Sweden

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2004年 / 26卷 / 10期

关键词：

crack closure; fatigue crack growth; mode II overloading;

D O I：

10.1016/j.ijfatigue.2004.03.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The effect of mode 11 loading on subsequent mode I crack growth is experimentally investigated on steel AISI 01. The results show that the mode I crack growth rate decreases after a single mode 11 load cycle. This effect remains also after the crack has propagated through the mode 11 plastic zone. The crack growth reduction is shown to be caused by crack closure due to tangential displacement of crack-surface irregularities. The durability of this reduction has a decisive influence on the fatigue life when the mode I R-ratio is not as high as to keep the entire load cycle above the closure level. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1083 / 1093

页数：11

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