Effects of friction and threshold stress intensity factor on mixed-mode I and II fatigue crack growth behavior

被引：0

作者：

Qian, J ^{[1
]}

Fatemi, A ^{[1
]}

机构：

[1] John Deere Power Syst Grp, Waterloo, IA 50704 USA

来源：

FATIGUE '99: PROCEEDINGS OF THE SEVENTH INTERNATIONAL FATIGUE CONGRESS, VOLS 1-4 | 1999年

关键词：

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Four-point bending and shear specimens made of SAE 1045 steel were asymmetrically loaded under different initial K-II/K-I ratios to study mixed-mode fatigue crack growth behavior. Under mode II load dominating cases, friction effect on fatigue crack growth rate was observed. A simple model is proposed to quantify this effect in terms of crack wake roughness. Mixed-mode fatigue crack growth threshold stress intensity factors were also obtained for the material under mode II load dominating conditions. Mode II threshold stress intensity factor range was found to be twice larger than the mode I threshold stress intensity factor range.

引用

页码：893 / 898

页数：6

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