超短激光脉冲作用下碳纤维复合材料的热动力学分析

Thermodynamic Analysis of Carbon Fiber Composite Under Ultrashort Laser Pulse

以T300碳纤维复合材料为研究对象,借助有限元分析软件,分别用单温模型和双温模型对不同激光脉冲宽度下T300碳纤维复合材料的电子和晶格温度进行计算,并与金属铜进行比较.分析结果表明,激光脉冲宽度会影响材料电子温度峰值与电子晶格耦合时间;当激光脉冲宽度大于10 ps时,单温模型和双温模型计算得到的晶格平衡温度差异较小,但当激光脉冲宽度低于10 ps时,两种模型计算结果存在较大差异.

Taking T300 carbon fiber composite as the research object,the electronic and lattice temperature of T300 carbon fiber composite under different laser pulse width were calculated by single temperature model and double temperature model with the help of finite element analysis software,and the results were compared with that of metal copper.The results show that the laser pulse width can affect the peak value of the electron temperature and the coupling time of the electron lattice.When the laser pulse width is greater than 10 ps,the difference between the lattice equilibrium temperature calculated by the single temperature model and the double temperature model is small,but when the laser pulse is less than 10 ps,the calculation results of the two models are quite different.