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提出了一种计算玻璃纤维/环氧树脂复合材料激光烧蚀过程中能量耦合率的模型,并通过对激光辐照玻璃纤维/环氧树脂复合材料的数值模拟计算了烧蚀过程中的激光透射率及表面温度,与实验结果吻合较好。结果表明,利用该模型可以计算玻璃纤维/环氧树脂复合材料激光烧蚀过程中的能量耦合率。利用该模型进一步计算了不同激光强度下耦合系数的变化规律,计算结果表明,对玻璃纤维/环氧树脂复合材料的激光烧蚀,激光的吸收方式存在体吸收向面吸收转变的过程;激光强度越大,能量耦合率增大到稳定值所需时间越短,体吸收向面吸收转变的过程越快。
A model for calculating the energy coupling rate in laser ablation of glass fiber / epoxy composites was proposed. The laser transmission during ablation was calculated by numerical simulation of laser irradiated glass fiber / epoxy composites Rate and surface temperature, consistent with the experimental results better. The results show that the model can be used to calculate the energy coupling rate of glass fiber / epoxy composites during laser ablation. The model was used to further calculate the variation of the coupling coefficient under different laser intensities. The calculated results show that there is absorption and absorption shift of the laser absorption mode in the laser ablation of glass fiber / epoxy composites. The laser intensity The larger the time required for the energy coupling rate to increase to a steady value, the faster the bulk absorption shifts toward the surface.