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基于微结构识别的单向复合材料导热系数预估

江华 毛军逵 屠泽灿 沈凯 宋金融 郭文 黄维娜

江华, 毛军逵, 屠泽灿, 沈凯, 宋金融, 郭文, 黄维娜. 基于微结构识别的单向复合材料导热系数预估[J]. 航空动力学报, 2016, 31(11): 2641-2651. doi: 10.13224/j.cnki.jasp.2016.11.011
引用本文: 江华, 毛军逵, 屠泽灿, 沈凯, 宋金融, 郭文, 黄维娜. 基于微结构识别的单向复合材料导热系数预估[J]. 航空动力学报, 2016, 31(11): 2641-2651. doi: 10.13224/j.cnki.jasp.2016.11.011
JIANG Hua, MAO Jun-kui, TU Ze-can, SHEN Kai, SONG Jin-rong, GUO Wen, HUANG Wei-na. Thermal conductivity prediction of unidirectional composites based on microstructure identification[J]. Journal of Aerospace Power, 2016, 31(11): 2641-2651. doi: 10.13224/j.cnki.jasp.2016.11.011
Citation: JIANG Hua, MAO Jun-kui, TU Ze-can, SHEN Kai, SONG Jin-rong, GUO Wen, HUANG Wei-na. Thermal conductivity prediction of unidirectional composites based on microstructure identification[J]. Journal of Aerospace Power, 2016, 31(11): 2641-2651. doi: 10.13224/j.cnki.jasp.2016.11.011

基于微结构识别的单向复合材料导热系数预估

doi: 10.13224/j.cnki.jasp.2016.11.011
基金项目: 

国家自然科学基金(11532007)

详细信息
    作者简介:

    江华(1990-),男,湖北黄冈人,硕士生,主要从事航空发动机传热、传质方面的研究.

  • 中图分类号: V232.4

Thermal conductivity prediction of unidirectional composites based on microstructure identification

  • 摘要: 以T300碳纤维/环氧树脂基单向复合材料为例,考虑纤维周围间隙缺陷的影响,建立了基于微观图像识别的等效导热系数预估方法.首先利用图像识别技术处理材料微观电镜照片,然后依据纤维体积分数稳定性判据应用几何重构技术建立了代表性单元,并通过在代表性单元(RVE)内部交界面处添加接触热阻的方法引入间隙缺陷的影响,最终利用有限元方法模拟得到等效导热系数(ETC).研究发现:间隙的位置对等效导热系数影响微弱;随着间隙缺陷占比和厚度的增加,等效导热系数显著降低;间隙缺陷占比大于0.8,无量纲间隙缺陷厚度小于0.15时,单向纤维增韧复合材料的等效导热系数受间隙影响最突出;相对于纤维和基体理想接触的情况,考虑间隙缺陷后,等效导热系数最大降幅可达52.1%.

     

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出版历程
  • 收稿日期:  2015-11-02
  • 刊出日期:  2016-11-28

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