Numerical computing and experimental validation of effective elastic properties of 2D multilayered C/SiC composites
Numerical computing and experimental validation of effective elastic properties of 2D multilayered C/SiC composites
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DOI：
10.1179/174328408x307292
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发表时间：
2008-11-01
影响因子：
1.8
通讯作者：
Zeng, Q. F.
中科院分区：
文献类型：
--
作者：
Wang, H. B.;Zhang, W. H.;Zeng, Q. F.
本文研究了用化学气相渗透法制备的碳纤维增强碳化硅复合材料(C/SiC)的有效弹性性能。基于扫描电子显微镜的材料层析成像，识别了孔洞和微裂纹的分布，并在有限元模型中考虑了空洞和微裂纹的影响。结果表明，所建立的多层C/SiC复合材料双尺度有限元模型能够真实地描述与化学气相渗透过程相关的孔洞和微裂纹的真实情况。有效模数的数值计算结果与实验结果吻合较好。
The effective elastic properties of carbon fibre reinforced silicon carbide composite (C/SiC) with multilayered matrix manufactured by chemical vapour infiltration method are studied in the present paper. Based on the material tomography of scanning electron microscopy, distributions of voids and microcracks are identified and taken into account in the finite element model of such C/SiC composite. It is shown the proposed two scale finite element models of multilayered C/SiC composites can characterise physically the real situation of involved voids and microcracks related to the chemical vapour infiltration process. The numerical results of effective moduli and experimental ones have a reasonable agreement.