树脂基碳纤维复合材料各向异性导热系数研究  

Anisotropic Thermal Conductivity of Carbon-fiber/epoxy Composites

作　　者：毋克凡 Nuanyai Pontarit 张虎[1] 唐桂华[2] WU Ke-Fan;NUANYAI Pontarit;ZHANG Hu;TANG Gui-Hua(State Key Laboratory for Strength and Vibration of Mechanical Structures,Shaanxi Key Laboratory of Environment and Control for Flight Vehicle,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China;Key Laboratory of Thermo-Fluid Science and Engineering,MOE,Xi'an Jiaotong University,Xi'an,Shaanxi 710049,China)

机构地区：[1]西安交通大学机械结构强度与振动国家重点实验室,陕西省先进飞行器服役环境与控制重点实验室,西安710049 [2]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《工程热物理学报》2021年第5期1282-1287,共6页Journal of Engineering Thermophysics

基　　金：博士后创新人才支持计划(No.20180244);国家自然科学基金(No.51825604)。

摘　　要：本文通过实验测试与数值预测结合研究了平纹、斜纹树脂基碳纤维复合材料的各向异性传热性能。实验方面,采用基于电加热膜加热的稳态"三明治"结构进行测试,得到了材料厚度与面内方向导热系数随温度的变化规律。模拟方面,观测复合材料内部微观结构,重构建立了代表性单胞模型,在三维方向分别模拟其一维稳态导热过程来预测材料不同方向的导热系数。研究结果表明,实验获得的树脂基碳纤维复合材料厚度与面内方向导热系数均随材料热面温度升高而近似线性增大,面内方向导热系数约为厚度方向的2.8倍,因密度相近,平纹、斜纹机织结构材料各主轴方向导热系数偏差小于10%。数值预测结果与实验结果基本符合,并对引起实验与数值结果偏差的来源进行分析。In this paper,the anisotropic heat transfer property of carbon-fiber/epoxy plain woven and twill woven composites is studied experimentally and numerically.In the experiment aspect,the steady-state"sandwich"structure based on the electric heating film is used to measure the out-of-plane and in-plane thermal conductivity at different temperature.In terms of simulation,a representative unit cell is established according to observation of the interior micro-structure of composite,and then anisotropic thermal conductivity along different principal axis can be obtained by simulating the 1 D steady-state heat transfer process within the model in the three-dimensional direction,respectively.The results show that both the out-of-plane and in-plane thermal conductivity of carbon-fiber/epoxy composites increase linearly with the hot surface temperature of composites,and the in-plane thermal conductivity is approximate 2.8 times as high as the out-of-plane thermal conductivity.The thermal conductivity deviation between the plain woven and twill woven composites along different main axis is less than 10%due to the similar density.The numerical prediction result agrees with the experimental result and the sources of leading to the deviations are also discussed.

关 键 词：树脂基碳纤维复合材料 导热系数 各向异性 实验测试 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]