Probabilistic-statistical approach to matrix damage and stress-strain behavior of 2-D woven SiC/SiC ceramic matrix composites

被引:27
|
作者
Lamon, J [1 ]
Thommeret, B [1 ]
Percevault, C [1 ]
机构
[1] Univ Bordeaux 1, SEP, CNRS, UMR 47,Lab Composites Thermostruct, F-33600 Pessac, France
关键词
fracture probability; finite element analysis; SiC/SiC; woven reinforcement; matrix cracking; stress-strain behavior;
D O I
10.1016/S0955-2219(98)00119-8
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 matrix damage evolution in a 2-D SiC/SiC composite reinforced with fabrics of fiber bundles was predicted from properties of basic constituents using a finite element analysis of failure probabilities. Failure probabilities were computed using a finite element post processor including the multiaxial elemental strength model for handling fracture statistics under multiaxial stress-states. The associated stress-strain behavior of the selected elementary cell was derived from the stress analysis. The predicted matrix damage evolution was found in good agreement with that identified by microscopy on practical 2-D SiC/SiC woven composites under tension. The predicted stress-strain behavior and Young's moduli compared satisfactorily with the experimental data. The approach was then applied to a cell of fully dense 2-D woven SiC/SiC composite under tension, and then to a cell of conventional 2-D woven SiC/SiC composite subject to a gradient of forces. (C) 1998 Elsevier Science Limited. All rights reserved.
引用
收藏
页码:1797 / 1808
页数:12
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