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首页> 外文期刊>International Journal of Heat and Mass Transfer >A comparative study for the thermal conductivities of C/SiC composites with different preform architectures fabricating by flexible oriented woven process
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A comparative study for the thermal conductivities of C/SiC composites with different preform architectures fabricating by flexible oriented woven process

机译：不同预成型架构采用柔性织物织物施工的C / SIC复合材料热导流的比较研究

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摘要

Thermal conductivity behaviors are one of the most important evaluations of C/SiC composites in the field of thermal protective structures. Represent volume element (RVE) models of microscale, void/matrix, and mesoscale proposed in this work are used to investigate the thermal conductivity behaviors of the C/SiC composites with different preform architectures. The thermal conductivities of 2.5D woven composites (2.5D), 3D woven orthogonal composites (3D), 3D five-directional woven composites (3DFD) and the combination of three structures fabricating by the flexible oriented woven process (FOWP) are comparatively discussed. The periodic temperature boundary conditions are applied to the RVE models to predict the thermal conductivities (TCs). The proposed analytical methods are validated by the values from the experiment and the literature. In addition, the effect of porosity and structure combination sequences on TCs is also taken into consideration. The results show that the 3D woven orthogonal composites have the lowest TCs and the structure combination sequences have little effect on TCs of C/SiC composites. The present work can potentially help to improve the design process and provide a significant reference to select the appropriate preform architectures.
机译：导热行为是热保护结构领域C / SIC复合材料中最重要的评价之一。代表本工作中提出的微观，空隙/矩阵和Messcale的音量元素（RVE）模型用于研究C / SIC复合材料的热导电行为，具有不同的预制架构。比较讨论了2.5D编织复合材料（2.5D），3D编织正交复合材料（3D），3D五向编织复合材料（3D），3D五向编织复合材料（3DFD）和由柔性取向编织过程（FOWP）制造的三种结构的组合。周期性边界条件应用于RVE模型以预测导热率（TCS）。所提出的分析方法由实验和文献的价值验证。此外，还考虑了孔隙率和结构组合序列对TCS的影响。结果表明，3D编织正交复合材料具有最低的TCS，结构组合序列对C / SiC复合材料的TC产生没有影响。目前的工作可能有助于改进设计过程并提供重要的参考以选择适当的预制架构。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第5期|120973.1-120973.11|共11页
  • 作者

    Zheng Sun; Zhongde Shan; Tianmin Shao;

  • 作者单位

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and Technology Beijing 100044 China;

    State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and Technology Beijing 100044 China Nanjing University of Aeronautics and Astronautics Nanjing 210016 Jiangsu China;

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    C/SiC composites; Thermal conductivity; RVE model; Preform architectures;

    机译：C / SIC复合材料;导热系数;rve模型;预成型架构;

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