Experimental K-calibration for corner cracks under bending loading

被引：1
|
作者：
Hadrboletz, A
Chen, DL
Weiss, B
Stickle, R
机构：
[1] Institute for Physical Chemistry, Department of Material Science, University of Vienna, A-1090 Vienna
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 1995年 / 17卷 / 08期
关键词：
stress intensity; correction function; corner crack; size; shape; stress ratio;
D O I：
10.1016/0142-1123(95)00028-3
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The geometric correction function F in the expression for stress intensity factors has been determined experimentally by a compliance method for bar-shaped specimens of Al-7475-T761 (with a rectangular cross-section) cyclically loaded in bending at R = -1 and room temperature. The experimental method makes it possible to resolve the behaviour of the crack during the tensile and compressive portions of the loading cycle. This leads to the introduction of the initial notch size as an additional correction parameter. The development of the equilibrium shape of the crack during crack growth up to long surface distances has been investigated. These results have been used for the determination of F. A comparison with literature data is presented.
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页码：545 / 550
页数：6
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