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Multiscale modeling and theoretical prediction for the thermal conductivity of porous plain-woven carbonized silica/phenolic composites

机译：多孔平织碳化二氧化硅/酚醛复合材料导热系数的多尺度建模和理论预测

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摘要

As a typical phenolic resin-based ablative material, silica/phenolic composites are extensively used in the aerospace industry. However, thermodynamic properties of carbonized plain-woven composites formed during ablation process are rarely studied. Toward this end, we propose a multiscale prediction model to investigate the effective thermal conductivity of porous plain-woven carbonized silica/phenolic composites by combining finite element analysis with existing two-phase composite models. A general approach is presented to compute the effective thermal conductivity with varying structural parameters. First, to consider effect of pores in phenolic resin matrix, the porous model is established to calculate the effective thermal conductivity of matrix with different porosities and pore morphologies. Then, heat transfer simulations are conducted on the multiscale model, including the yarn scale in the axial and transverse directions and the woven composite scale in the in-plane and out-of-plane directions. Empirical formulas for effective thermal conductivity are obtained, which comprehensively considers the factors of matrix porosity, fiber volume fraction, and temperature.
机译：作为典型的基于酚醛树脂的烧蚀材料，二氧化硅/酚醛复合材料被广泛用于航空航天工业。但是，很少研究在烧蚀过程中形成的碳化平纹复合材料的热力学性质。为此，我们提出了一种多尺度预测模型，通过将有限元分析与现有的两相复合材料模型相结合，研究多孔平纹碳化碳化硅/酚醛复合材料的有效导热系数。提出了一种通用的方法来计算具有变化的结构参数的有效导热率。首先，考虑孔隙对酚醛树脂基体的影响，建立了多孔模型，以计算不同孔隙率和孔隙形态的基体的有效导热系数。然后，在多尺度模型上进行传热模拟，包括轴向和横向的纱线尺度以及面内和面外方向的编织复合尺度。获得了有效导热系数的经验公式，该公式综合考虑了基质孔隙率，纤维体积分数和温度等因素。

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  • 来源
    《Composite Structures》 |2019年第5期|278-288|共11页
  • 作者

    Zhou LiChuan; Sun XiaoHao; Chen MingWei; Zhu YinBo; Wu HengAn;

  • 作者单位

    Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R China;

    Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R China;

    Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R China;

    Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R China;

    Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R 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

    Plain-woven composites; Multiscale modeling; Homogenization; Effective thermal conductivity; Porous matrix;

    机译：平织复合材料;多尺度建模;均质化;有效导热系数;多孔基;
  • 入库时间 2022-08-18 04:13:15

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