SIZE EFFECT IN FRACTURE OF CERAMICS AND ITS USE TO DETERMINE FRACTURE ENERGY AND EFFECTIVE PROCESS ZONE LENGTH

被引：153
作者：
BAZANT, ZP
KAZEMI, MT
机构：
[1] Center for Advanced Cement-Based Materials, Northwestern University, Evanston, Illinois
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 07期
关键词：
energy; fracture; mechanical properties; modeling; R curve;
D O I：
10.1111/j.1151-2916.1990.tb05233.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：
The paper shows that a previously proposed size effect law can be used to identify nonlinear fracture properties solely from measured maximum loads of geometrically similar ceramic fracture specimens of sufficiently different sizes. This law represents a first‐order global approximation of the deviations from linear elastic fracture mechanics, independent of the type of the toughening mechanism in the fracture process zone. It provides a simple and unambiguous way to determine the size‐ and shape‐independent values of the fracture energy the effective length of the process zone, and the effective crack‐tip opening displacement. It also yields the R curve, which is geometry (shape) dependent. The proximity of response to linear elastic fracture mechanics is characterized by a brittleness number, which is shape independent. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码：1841 / 1853
页数：13
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