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结合建立的颗粒随机分布复合材料的微结构模型和基于均匀化理论统计的双尺度计算方法,针对氮化硼颗粒增强高密度聚乙烯(BN/HDPE)复合材料,研究了颗粒形状、体积分数和空间分布参数等微结构特征对复合材料有效热传导系数的影响。结果表明:颗粒体积分数的增加将导致有效热传导系数升高;球形颗粒的位置参数、长椭球颗粒的取向程度都对有效热传导系数有重要影响。数值试验表明,材料的微结构特征对复合材料的有效热传导系数具有极大影响。
Combined with the microstructure model of randomly distributed particles and the two-scale calculation method based on the theory of homogenization, aiming at the boron nitride particle reinforced high density polyethylene (BN / HDPE) composites, the effects of particle shape, volume fraction and Effect of Microstructure Characteristics such as Spatial Distribution Parameters on Effective Thermal Conductivity of Composite Materials. The results show that the increase of particle volume fraction will lead to the increase of effective heat transfer coefficient. The position parameters of spherical particles and the orientation of ellipsoidal particles all have an important effect on the effective heat transfer coefficient. Numerical experiments show that the microstructure characteristics of the material have a great influence on the effective thermal conductivity of the composite.