孔隙率对编织碳纤维增强聚合物热扩散系数的影响  

Effect of Porosity on Thermal Diffusivity of Woven Carbon Fiber Reinforced Polymers

作　　者：吴恩启[1] 李美华[1] 高倩 Mandelis Andreas 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]多伦多大学扩散波先进技术中心

出　　处：《激光与光电子学进展》2017年第11期320-325,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51205255);国家科技支撑计划(2015BAK16B04)

摘　　要：提出了一种四层光热辐射模型,研究了编织碳纤维增强聚合物(CFRP)的热扩散系数。以玻璃碳为参考材料,标定了实验装置,完成了孔隙率为0~18.32%的14组CFRP样品的检测实验。构造了最小二乘目标函数,利用遗传算法求出了最优解,得到了不同孔隙率下的CFRP热扩散系数。结果表明,14组CFRP样品的热扩散系数为3.01×10-7~8.73×10-7 m2/s,且随着孔隙率的增大整体呈下降趋势;当孔隙率小于1.00%时,热扩散系数的下降趋势较明显,但当孔隙率大于1.00%后,下降速度趋于平缓。A four-layer photothermal radiometry model is proposed and the thermal diffusivity of woven carbon fiber reinforced polymers （CFRP） is researched. The experimental device is calibrated with the glass carbon as the reference material, and the detection tests of the fourteen groups of CFRP samples with porosities of 0 to 18.32% are accomplished. The least-square objective function is constructed, the optimal solution is obtained by the genetic algorithm, and the thermal diffusivities of CFRP with different porosities are acquired. The results show that the thermal diffusivities of the fourteen group of CFRP samples are within the range of 3.01×10^-7～8.73×10^-7m^2/s, which decrease with the increase of porosity. When the porosity is smaller than 1.00%, the thermal diffusivity shows an obvious downtrend, while when the porosity is larger than 1.00%, the descent speed slows down.

关 键 词：材料 热扩散系数 光热辐射 编织碳纤维增强聚合物 孔隙率 

分 类 号：TN249[电子电信—物理电子学]