激光辐照碳纤维复合材料的光学行为与仿真  

OPTICAL BEHAVIOR AND SIMULATION OF LASER IRRADIATED CARBON FIBER COMPOSITES

作　　者：朱文凯 还大军[1] 肖军[1] 王武强 ZHU Wen-kai;HUAN Da-jun;XIAO Jun;WANG Wu-qiang(College of Material Science and Technology, Nanjing University of Aeronauticsand Astronautics, Nanjing 210016, China)

机构地区：[1]南京航空航天大学材料科学与技术学院

出　　处：《玻璃钢／复合材料》2019年第8期72-77,共6页Fiber Reinforced Plastics/Composites

基　　金：国家重点基础研究发展计划(2014CB046501);江苏高校优势学科建设工程

摘　　要：为了研究激光辐照碳纤维复合材料的光学行为,采用碳纤维增强聚醚醚酮复合材料(CF/PEEK)作为试验样品,通过积分球实验测量样品随波长和入射角变化的反射率;进行了激光束反射实验,观察宏观反射图案随光线入射角和样品偏角的变化行为;对激光与样品间的微观行为进行分析,并通过光学设计软件对反射过程进行模拟仿真。积分球实验表明,样品反射率随波长的增加而变大,随入射角的增大而变小。宏观反射实验表明,光线入射角和样品偏角对反射图案均有较大影响,反射行为主要受表层纤维的镜面反射支配,而且模拟结果与试验结果基本一致。基于菲涅尔方程,根据最小二乘法拟合的样品有效折射率为n=2.26。In this study, the carbon fiber reinforced polyetheretherketone composite (CF/PEEK) was used as a test sample to study the optical behavior of laser irradiated carbon fiber composites. The reflectance of the sample as a function of wavelength and angle of incidence was measured by an integrating sphere experiment. A laser beam reflection experiment was carried out to observe the behavior of the macroscopic reflection pattern as a function of the incident angle of the light and the angle of the sample. The microscopic behavior between the laser and the sample was analyzed, and the reflection process was simulated by optical design software. The integrating sphere experiment shows that the reflectance of the sample becomes larger as the wavelength increases, and becomes smaller as the incident angle increases. Macroscopic reflection experiment shows that the incident angle of light and the off-angle of the sample have a great influence on the reflection pattern. The reflection behavior is mainly dominated by the specular reflection of the surface fibers, and the simulation results are basically consistent with the experimental results. Based on the Fresnel equation, the effective refractive index of the sample fitted according to the least squares method is n =2.26.

关 键 词：碳纤维复合材料 激光加工 CF/PEEK 积分球实验 反射率 有效折射率 模拟仿真 

分 类 号：TB332[一般工业技术—材料科学与工程]