Abstract The complex shaped fillers are extensive manufactured to replace the conventional spherical filler for their excellent strengthen heat transfer performance. In this study, the effects on the effective thermal conductivity of filled composites are investigated in regard to filler content, complex shape, directional angle and interface thermal resistance. The results indicate that the effect of interface thermal resistance is direct related with the surface area of the filler. The composite with I shaped filler has the largest decrease of effective thermal conductivity that caused by interface thermal resistance, the spherical filler least. The difference between various shaped fillers decrease with interface thermal resistance. However, I shaped and T shaped fillers also have the best performance of enhancing heat transfer in real filled composites. The rectangular and elliptical fillers have great impact on the thermal conductivity only when they are placed along the heat flux direction. The directional angle is a key point for fillers with large ratio of length to diameter. The random filler model is a more accurate way to predict the thermal conductivity of filled composite, and it is highly closed to tested results.

中文翻译：

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填料分布和界面热阻对复合形状填料填充复合材料热导率的影响

摘要 复杂形状的填料因其优异的强化传热性能而被大量生产以替代传统的球形填料。在这项研究中，研究了填料含量、复杂形状、方向角和界面热阻对填充复合材料的有效热导率的影响。结果表明界面热阻的影响与填料的表面积直接相关。含I型填料的复合材料因界面热阻引起的有效热导率下降最大，球形填料最小。各种异型填料之间的差异随着界面热阻而减小。然而，I形和T形填料在增强真实填充复合材料的传热方面也具有最佳性能。矩形和椭圆形填料只有沿热流方向放置时才对热导率产生很大影响。对于长径比大的填料来说，方向角是一个关键点。随机填料模型是预测填充复合材料热导率的更准确方法，并且与测试结果高度接近。