CONTROLLED CRACK SHAPES FOR INDENTATION FRACTURE OF SODA LIME GLASS

被引：9
|
作者：
SMITH, SM
SCATTERGOOD, RO
机构：
[1] Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 09期
关键词：
D O I：
10.1111/j.1151-2916.1992.tb05618.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：
Radial cracks for indented soda-lime glass aged in distilled water were highly elliptical because of truncation by lateral cracks. Indentation in silicone oil minimized radial/lateral crack interaction but still produced cracks having nominally constant ellipticity during bend testing. Analysis of applied stress/indentation crack length data using stress intensity factors based on half-penny crack shape resulted in apparent R-curve behavior and/or overestimation of the fracture toughness. Incorporation of elliptical shape factors eliminated the R-curve behavior and reduced measured toughness to near the accepted value for soda-lime glass.
引用
收藏
页码：2593 / 2596
页数：4
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