连续激光辐照下碳纤维环氧树脂复合材料热解问题研究  

Research on Pyrolysis of Carbon-Fiber Reinforced Epoxy Resin Composite Irradiated by CW Laser

作　　者：贺敏波[1,2] 马志亮[1,2] 刘卫平[1,2] 韦成华[1,2] 林新伟[1,2] 陈林柱[1,2] 

机构地区：[1]西北核技术研究所,西安710024 [2]激光与物质相互作用国家重点实验室,西安710024

出　　处：《现代应用物理》2016年第1期46-50,共5页Modern Applied Physics

摘　　要：从能量守恒出发,将热解吸收的能量隐含于材料等效热容中,建立了连续激光辐照下碳纤维环氧树脂复合材料热响应的三维计算模型。在考虑辐射换热和表面对流换热的影响下,利用该模型计算了连续激光辐照下碳纤维环氧树脂复合材料的温度场和热解质量损失,并与实验结果进行了比较,两者比较吻合。结果表明:氮气流保护可以有效地抑制氧化效应,但实验中氧化过程不可避免;随激光辐照时间增大,试样质量损失逐渐增大,在长时间辐照下氧化带来的额外质量损失逐渐显现;在低功率密度下,试样以热解为主,质量损失随功率密度增大而增大,但随着功率密度升高,氧化的影响逐渐增强。This paper studies pyrolysis damage in carbon-fiber reinforced epoxy resin composite materials irradiated by laser.According to the energy conservation,the absorption energy of pyrolysis was reasonably included in the calculation of the equivalent heat capacity of the materials.A 3-D calculation model was established to describe the pyrolysis response of the mateirals irradiated by laser.Taking into account of the effects of heat radiation and heat convection,the temperature and the mass loss were calculated respectively as the functions of irradiation time and power density.The results agree well with those of the experiment.The study reveals that the oxidation is unavoidable in experiment though the oxidation effects can be effectively restrained by nitrogen protection;the mass loss of the sample materials increases gradually with irradiation time,and for a long irradiation time,the mass loss caused by oxidation will become obvious;for a lower power density,pyrolysis is the dominant effect,and the mass loss also increases along with the increase of the power density,and the oxidation effect will be enhanced.

关 键 词：激光辐照 复合材料 热解 数值模拟 

分 类 号：TN249[电子电信—物理电子学]