Effects of grain size on crack aspect ratio and crack initiation limit in notched specimen of austenitic stainless steel(JIS SUS304)

被引：1
|
作者：
Matsueda, Takahiro [1 ]
机构：
[1] Toyama Univ, Fac Engn, Dept Mech & Intelligence Syst Engn, Toyama 9308555, Japan
来源：
INDUSTRIAL ENGINEERING AND APPLIED RESEARCH | 2014年 / 620卷
关键词：
Crack; Austenite; Fatigue limit; Stress intensity factor; Average grain size; STRESS INTENSITY FACTORS; FATIGUE-STRENGTH; ARBITRARY SHAPE; PROPAGATION; DEFECTS;
D O I：
10.4028/www.scientific.net/AMM.620.438
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Aspect ratio is a key factor to calculate stress intensity factor (SIF) K using fracture mechanics. Cracks are approximated to be semi-circle or semi-ellipse in simple calculation, however, their empirical shapes are changed by stress concentration. In this study, in order to calculate K simply and precisely, a new method to predict fatigue crack initiation stress, sigma(w1) of austenitic stainless steel with modified aspect ratio is discussed. The new method succeeded to predict sigma(w1) within 20% error from empirical values using average austenite grain sizes.
引用
收藏
页码：438 / 442
页数：5
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