EFFECTS OF CRACK CLOSURE AND MEAN STRESS ON THE THRESHOLD STRESS INTENSITY FACTOR FOR FATIGUE OF AN ALUMINUM CASTING ALLOY

被引：21
|
作者：
COUPER, MJ
GRIFFITHS, JR
机构：
[1] Department of Materials Engineering, Monash University, Clayton, Victoria
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1990年 / 13卷 / 06期
关键词：
D O I：
10.1111/j.1460-2695.1990.tb00631.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Abstract— Observations have been made of the threshold fatigue properties of an Al‐Mg‐Si casting alloy. First, it has been shown that there exists a critical value of the stress ratio, R, below which the threshold stress intensity factor decreases with increasing R but above which it is constant. Second, measurements of the cyclic crack opening displacement have been used to examine crack closure effects and to deduce the effective cyclic stress intensity factor. The two sets of data are compared with existing models for threshold phenomena. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：615 / 624
页数：10
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