A new fracture mechanics model for multiple matrix cracks of SiC fiber reinforced brittle-matrix composites

被引：26

作者：

Okabe, T

Takeda, N

Komotori, J

Shimizu, M

Curtin, WA

机构：

[1] Keio Univ, Dept Mech Engn, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

[2] Univ Tokyo, Dept Aeronaut & Astronaut, Grad Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[3] Brown Univ, Div Engn, Providence, RI 02912 USA

来源：

ACTA MATERIALIA | 1999年 / 47卷 / 17期

关键词：

ceramics; composites; brittle fracture; fibers;

D O I：

10.1016/S1359-6454(99)00309-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new model is proposed for multiple matrix cracking in order to take into account the role of matrix-rich regions in the cross section in initiating crack growth. The model is used to predict the matrix cracking stress and the total number of matrix cracks. The model converts the matrix-rich regions into equivalent penny shape crack sizes and predicts the matrix cracking stress with a fracture mechanics crack-bridging model. The estimated distribution of matrix cracking stresses is used as statistical input to predict the number of matrix cracks. The results show good agreement with the experimental results by replica observations. Therefore, it is found that the matrix cracking behavior mainly depends on the distribution of matrix-rich regions in the composite. (C) 1999 Acta Metallurgica inc. Published by Elsevier Science Ltd. Ali rights reserved.

引用

页码：4299 / 4309

页数：11

共 21 条

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