三维编织复合材料热物理性能实验

针对不同编织工艺参数的三维四向编织复合材料,进行了热环境下的热物理性能实验研究,获得了热环境下三维四向编织复合材料的热物理性能变化规律及其分布特征,分析了环境温度和编织角对材料的热膨胀系数(CTE)、热传导系数(CTC)、比热(SH)以及热扩散率(TD)的影响,得到了一些重要结论。这些结果为三维编织复合材料的热物理性能数值分析以及进一步研究材料的热力耦合行为奠定了实验基础。

Experimental investigation on thermo-physical properties of 3D braided composites

The thermo-physical property experiments had been done for the 3D 4-directional braided composites with different braiding parameters in thermal environment.The changing rule and distribution characteristics of the thermo-physical properties for the 3D 4-directional braided composites were obtained.The effects of temperature and braiding angle on the coefficients of thermal expansion (CTE),the coefficients of thermal conduction (CTC),the specific heat(SH)and the thermal diffusivities(TD)were investigated at the same time,by which some important conclusions were drawn.These results can provide an experimental basis for the numerical analysis on the thermo-physical properties and the further studies on the thermo-mechanical coupling behaviors of 3D braided composites.