对含有随机定向的异构形和圆形填充剂的复合材料的有效热和电磁性能进行微机械分析
1Division of Mechanical Engineering, Kyoto Institute of Technology, 1 Matsugasaki, Sakyo-ku, Kyoto City, Kyoto, Japan.
Heliyon
|July 7, 2023
概括
准确建模复合材料需要考虑填充剂形状和异构性质. 这项研究提供了有效的热和电磁性质的一般解决方案,通过实验数据验证.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 物理 物理学 物理
背景情况:
- 具有随机定向填充物的复合材料在预测有效性质方面存在挑战.
- 现有的模型往往限制了填充剂的特性或形状,限制了它们的适用性.
- 准确地描述热和电磁行为对于材料设计至关重要.
研究的目的:
- 开发通用微机械模型,用于预测具有随机定向填充剂的复合材料的有效热和电磁性质.
- 在不限制填充物属性 (异极形或形) 和形状 (圆形) 的情况下,导出明确的解决方案.
- 研究填充剂形状,异构性和体积分数对材料性能的影响.
主要方法:
- 微机械建模结合了埃舍尔比的等效纳入方法与自相一致或莫里-塔纳卡理论.
- 圆形填充剂的分析,具有异型形或形特性.
- 检查碳填充剂/聚乙烯和石英颗粒/聚乙烯系统.
主要成果:
- 与碳填充剂/聚乙烯复合材料中的纤维填充剂相比,平面填充剂的有效导热率更高.
- 与平面碳填充剂的同位素假设相比,异型填充剂的异型特性显著影响结果.
- 莫里-塔纳卡理论与石英颗粒/聚乙烯复合材料的实验数据更一致,即使在高填充体积分数下也是如此.
结论:
- 同时考虑填充物形状和异型特性对于在随机定向的复合材料中准确评估性能至关重要.
- 衍生出的分析解决方案有效地解释了实验结果,并适用于现实世界的材料.
- 该研究为预测各种复合系统的有效性质提供了一个强大的框架.
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