Influence of a finite notch root radius on fracture toughness

被引：50
|
作者：
Fett, T [1 ]
机构：
[1] Forschungszentrum Karlsruhe, Inst Mat Forsch 2, D-76021 Karlsruhe, Germany
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2005年 / 25卷 / 05期
关键词：
crack tip toughness; fracture toughness; notch effect; R-curve; testing;
D O I：
10.1016/j.jeurceramsoc.2004.01.010
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：
The validity of fracture toughness data from tests with V-notched bending bars depends in the notch root radius and the presence of an R-curve behaviour. In a theoretical study it is shown how the notch radius affects the formally computed conventional toughnesses. These are computed under the assumption that the introduced notch with a small crack at the notch root acts as a long crack of the same total size and, in a stronger simplification, that the crack length is identical with the depth of the notch. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：543 / 547
页数：5
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