摘要
以跨音速风洞为平台,开展了表面亚音速气流环境下,连续激光辐照碳纤维复合材料实验研究。研究表明,无气流时,喷出的热分解产物会降低激光能量透过率;有气流时,气流快速带走热分解产物,并对基体分解后裸露的碳纤维材料进行冲刷和剥离,加速了材料的烧蚀。表面亚音速气流的加载有利于激光对碳纤维复合材料的破坏,且马赫数越大越有利;在激光总能量不变的情况下,适当降低激光功率密度,延长激光作用时间,有利于激光对碳纤维复合材料的破坏。
Based on a transonic wind tunnel platform, experiments had been done for studying the laser ablation with carbon fi-ber materials in subsonic airflow environment. Experimental results show that, without air flow on the sample surface, the la-ser energy transmittance is reduced by the ejected thermal decomposition products, which reduces the laser ablation. Howeverwith air flow on the surface, the surface of the carbon fiber material is under the function of erosion and stripping, where thethermal decomposition products are blown away. The surface subsonic flow can enhance the breakage of carbon fiber materialsunder laser irradiation. And on the condition of unchanging the total laser energy, the adjustment of reducing the laser intensityappropriately and extending the laser irradiation duration can enhance the breakage of carbon fiber materials.
出处
《应用激光》
CSCD
北大核心
2014年第2期118-121,共4页
Applied Laser
关键词
激光辐照
碳纤维复合材料
激光烧蚀
laser irradiation
carbon fiber composites
laser ablation
