DETERMINATION OF SUBCRITICAL CRACK-GROWTH PARAMETERS BY IN-SITU OBSERVATION OF INDENTATION CRACKS

被引：26
作者：
DWIVEDI, PJ
GREEN, DJ
机构：
[1] Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1995年 / 78卷 / 08期
关键词：
D O I：
10.1111/j.1151-2916.1995.tb08624.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A technique to determine stress intensity factor-crack velocity (K-v) relationships for subcritical crack growth from in situ observation of indentation cracks is described. To minimize the effect of residual contact stresses and lateral crack interaction, measurements were made only on cracks that had undergone significant subcritical crack growth. Crack shapes were determined fractographically from crack-arrest markings, produced by temporary unloading during the crack extension process. The subcritical crack growth parameters obtained by this technique were in excellent agreement with those determined from dynamic fatigue and previous studies.
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页码：2122 / 2128
页数：7
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