纤维体积含量对碳纤维增强环氧树脂层压板横向和纤维方向热导率的影响

Bard Simon, Schönl Florian, Demleitner Martin, Altstädt Volker

Department of Polymer Engineering, University of Bayreuth, Universitätsstr. 30, 95444 Bayreuth, Germany.

Materials (Basel). 2019 Apr 2;12(7):1084. doi: 10.3390/ma12071084.

Thermal conductivity is an important material property for thermo-mechanical calculations, as mechanical properties strongly depend on the temperature and heat distribution in the manufactured parts. Although several suggestions for approximation formulae have been made, existing experimental data are rare and are not comparable due to different measurement methods. In addition, scarcely has the thermal conductivity in both the fiber direction and transverse direction been studied. The aim of the current research is to show the influence of carbon fiber volume content on the thermal conductivity of laminates. The values are then used to verify the micromechanical models used in the literature. A strong influence on the thermal conductivity could be determined. For the transverse thermal conductivity, the correlation was exponential; for the conductivity in the fiber direction, a linear correlation was found.

热导率是热机械计算中的一项重要材料属性，因为机械性能在很大程度上取决于所制造部件中的温度和热分布。尽管已经提出了一些近似公式的建议，但现有的实验数据很少，并且由于测量方法不同而无法进行比较。此外，几乎没有对纤维方向和横向方向的热导率进行过研究。当前研究的目的是展示碳纤维体积含量对层压板热导率的影响。然后将这些值用于验证文献中使用的微观力学模型。可以确定其对热导率有很大影响。对于横向热导率，相关性呈指数关系；对于纤维方向的热导率，则发现呈线性相关。