摘要
实验研究了靶材表面存在和不存在切向空气气流时,975nm连续激光对碳纤维增强树脂基复合材料的辐照效应,发现切向气流的加载有利于激光对碳纤维复合材料的破坏。从理论上对激光辐照下碳纤维复合材料的破坏机理进行了初步分析,基于碳的氧化特性和氧化反应机理,推导了碳纤维的氧化速率方程。采用改进的光滑粒子方法,对激光辐照下复合材料树脂基热解时的3维温度场模型进行数值求解,从数值上模拟了激光对碳纤维复合材料的破坏效应,模拟结果与实验结果一致。
The experiment of 975nm continuous wave laser irradiating carbon-fiber reinforced resin composite was studied,while the front surface of the target was provided with and without tangential airflow.Analysis indicates that the loading of tangential airflow can enhance the damage effect of laser on carbon-fiber composite.The failure mechanism of carbon-fiber composite irradiated by laser is preliminarily studied in theory.Based on the oxidation characteristics and the oxidation reaction mechanism of carbon,the oxidation rate equation of carbon-fiber was obtained.The three-dimensional temperature field model of thermally decomposing resin composite irradiated by laser was solved using modified smoothed particle hydrodynamics,the failure mechanism of carbon-fiber composite irradiated by laser was numerical simulated.Simulation results proved to be consistent with experimental results.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2011年第2期23-27,共5页
Journal of National University of Defense Technology
关键词
激光辐照
碳纤维复合材料
切向气流
氧化速率
破坏
laser irradiation
carbon-fiber composite
tangential airflow
oxidation rate
damage
