Crack arrest in Si3N4-based layered composites with residual stress

被引：51
|
作者：
Lugovy, M
Slyunyayev, V
Subbotin, V
Orlovskaya, N
Gogotsi, G
机构：
[1] Natl Acad Sci, Inst Problems Mat Sci, UA-03142 Kiev, Ukraine
[2] Natl Acad Sci Ukraine, Inst Prob Strenght, UA-01014 Kiev, Ukraine
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2004年 / 64卷 / 13-14期
关键词：
layered structures; fracture toughness; modelling; crack; residual stress;
D O I：
10.1016/j.compscitech.2004.02.007
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Effect of macroscopic residual stresses on fracture resistance and crack arrest in non-symmetric Si3N4/Si3N4-xTiN (x = 20, 30 wt%) layered specimens was investigated in this study. One of the aims of the work was also an examination of compliance technique to study R-curve effect as applied to layered specimens. A special attention was paid to the development of an analytical method to calculate fracture resistance - crack length dependence in layered structures having different elastic moduli of layers. The validity of the method and its application were examined by calculating stress intensity coefficients for edge-cracked layered specimens and comparison of the results with mechanical characteristics obtained from bending test. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1947 / 1957
页数：11
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