Conditions for matrix crack deflection at an interface in ceramic matrix composites

被引：41
|
作者：
Martin, E [1 ]
Peters, PWM
Leguillon, D
Quenisset, JM
机构：
[1] Univ Bordeaux, IUT A, Lab Genie Mecan, F-33405 Talence, France
[2] DLR, Mat Res Inst, D-51140 Cologne, Germany
[3] Univ Paris 06, CNRS URA 229, Modelisat Mecan Lab, F-75252 Paris 05, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 250卷 / 02期
关键词：
ceramic matrix composites; crack deflection;
D O I：
10.1016/S0921-5093(98)00604-2
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper describes a numerical approach developed to simulate the mechanism of matrix crack deflection at the fibre/matrix interface in brittle matrix composites. For this purpose, the fracture behaviour of a unit cell (microcomposite) consisting of a single fibre surrounded by a cylindrical tube of matrix was studied with the help of a finite element model. A fracture mechanics approach was used to design a criterion for deflection at the fibre/matrix interface of an annular crack present in the matrix. The analysis of the fracture behaviour of SiC/SiC and SiC/glass ceramics microcomposites shows that the introduction of a low modulus and low toughness interfacial layer at the fibre/matrix interface (e.g. a carbon coating) greatly favours matrix crack deflection at the interphase/fibre interface. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：291 / 302
页数：12
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