摘要
为了研究碳纤维/环氧树脂复合材料层合板的激光烧蚀温度场、退移速率,应用有限元软件ABAQUS的python语言进行二次开发,建立了辐照面动态变化的有限元烧蚀模型,并选用功率密度分别为1.528 kW/cm2及3.82 kW/cm2的高强度激光器对该复合材料进行了激光辐照试验。定量分析了不同功率激光辐照下,碳纤维/环氧树脂层合板的温度场分布以及辐照界面的退移速率。研究结果表明:有限元烧蚀模型能够有效地模拟层合板的烧蚀,随着激光功率密度变大,辐照面附近温度梯度及烧蚀界面退移速率变大,基体热解区域尺度变小,背壁温度梯度变化相对较小,随着辐照时间的增加,烧蚀界面退移速率趋于恒定。
In order to study the ablation temperature field and recession rate of the carbon/epoxy composite laminate, the interpretation language python of finite element software ABAQUS was used and the finite element ablation model with variation boundary condition was created. Laser irradiation experiments of the composite material were carried out by a high power CO2 laser with the power density of 1.528 kW/cm^2 and 3.82 kW/cm^2 respectively. The temperature field and the recession rate of the carbon/epoxy composite laminate were analyzed quantitatively under different laser powers. The results indicate that the finite element ablation model can simulate the laminates ablation effectively. When the laser power density is increased, the temperature gradient and recession rate of the irradiation surface will increase, the thermal decomposition scale of epoxy will decrease, and the temperature gradient of rear surface increases less. The recession rate of the irradiation surface drives to invariableness with irradiation time increasing.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第9期1691-1695,共5页
Infrared and Laser Engineering
