Evaluating fatigue crack propagation properties using miniature specimens

被引：15
|
作者：
Shin, Chow-Shing [1 ]
Lin, Shi-Wei [1 ]
机构：
[1] Natl Taiwan Univ, Dept Mech Engn, Taipei 10617, Taiwan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2012年 / 43卷
关键词：
Fatigue crack propagation properties; Small specimen test technique; Crack closure; Stress state; Miniature specimens; GROWTH-RATE; THICKNESS; STEEL; ALLOY; CLOSURE; SIZE;
D O I：
10.1016/j.ijfatigue.2012.02.018
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Standard fatigue crack propagation (FCP) test placed strict requirement on specimen size. FCP rate in subsize specimen was found to be slightly but consistently slower than that in the standard specimens. Based on a critical study on two aluminum alloys and two steels, we found the lower rates can be attributed to the plane stress state in the miniature specimens being different from that in the standard specimens. By taking account of crack closure, the miniature specimen data are brought in line with the standard specimen results and may serve as an upper bound estimate of FCP properties. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：105 / 110
页数：6
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