| 考虑孔隙和微裂纹缺陷的 C/ C2SiC编织复合材料等效模量计算 |
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| 引用本文： | 汪海滨,张卫红,杨军刚,许英杰,曾庆丰.考虑孔隙和微裂纹缺陷的 C/ C2SiC编织复合材料等效模量计算[J].复合材料学报,2008,25(3):182-189. |
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| 作者姓名： | 汪海滨 张卫红 杨军刚 许英杰 曾庆丰 |
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| 作者单位： | [1]西北工业大学中法并行工程联合实验室,高性能计算中心,现代设计与集成制造教育部重点实验室,西安710072 [2]西北工业大学超高温结构复合材料国防科技重点实验室,西安710072 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，国家高技术研究发展计划(863计划)，高等学校博士学科点专项科研项目，航空基础科学基金，陕西省科技计划，陕西省西安市科技计划 |
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| 摘 要： | 通过观察 C/ C2SiC复合材料组元分布的扫描电子显微镜(SEM)照片 , 获得了 C/ C2SiC复合材料化学气相渗透(CVI)制备过程中产生孔隙和微裂纹的几何信息。在此基础上 , 建立了包含孔隙和微裂纹的 C/ C2SiC微结构有限元模型 , 并利用均匀化等效计算方法预测了平纹编织 C/ C2 SiC复合材料的模量。针对 CVI沉积方式制备的 2组不同的 C/ C2SiC复合材料 , 实验测试与等效计算结果表明 : 基于 SEM照片建立的 C/ C2SiC纤维束和复合材料微结构有限元模型 , 能够反映 CVI工艺制备 C/ C2SiC中孔隙和微裂纹的分布状况; 计算结果与实验数据有良好的一致性 , 数值计算可有效预测 C/ C2SiC编织复合材料的模量。
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| 关 键 词： | C/ C2SiC复合材料 化学气相渗透 孔隙 微裂纹 均匀化方法 |
| 文章编号： | 1000-3851(2008)03-0182-08 |
| 收稿时间： | 2007-07-25 |
| 修稿时间： | 2007年7月25日 |
Numerical computing of effective modulus of woven C/ C2SiC composites including porosities and micro2cracks |
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| WANG Haibin,ZHANG Weihong,YANG Jungang,XU Yingjie,ZENG Qingfeng.Numerical computing of effective modulus of woven C/ C2SiC composites including porosities and micro2cracks[J].Acta Materiae Compositae Sinica,2008,25(3):182-189. |
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| Authors: | WANG Haibin ZHANG Weihong YANG Jungang XU Yingjie ZENG Qingfeng |
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| Affiliation: | (11 Sino2 French Laboratory of Concurrent Engineering| High Performance Computing Center| The Key Laboratory of Contemporary Design And Integrated Manufacturing Technology of Minist ry of Education| Northwestern Polytechnical University| Xi?an 710072| China |21 National Key Laboratory of Thermost ructure Composite Materials|Northwestern Polytechnical University| Xi&rsquo|an 710072| China) |
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| Abstract: | The woven carbon fiber reinforced C2SiC binary mat rix (C/ C2SiC) composite manufactured by chemical
vapor infilt ration (CVI) method was investigated. Based on the material tomography of scanning electron microscopy (SEM) , dist ributions of porosities and micro2cracks were identified and included in the finite element model of C/ C2 SiC composites. The homogenization method was used for the evaluation of effective modulus of woven C/ C2 SiC composites. The result s of the numerical computing and experimental test s were compared for two cases of C/ C2SiC composites with different layer thickness. It is shown that the proposed finite element models of C/ C2SiC can char2 acterize physically the real situation of the involved porosities and micro 2 cracks related to the CVI process. The numerical result s of effective modulus agree reasonably with the experimental ones. |
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| Keywords: | C/ C2SiC composites CVI porosity micro2crack homogenization method |
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