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根据实验现象,提出了计算力学剥蚀的模型和判据,将剥蚀过程分解为材料分层和层内断裂两个过程:对分层过程利用激光辐照玻璃纤维/环氧树脂复合材料的热力学模型计算,对层内断裂过程用板壳模型计算。利用实验结果验证了模型的合理性,计算结果表明,力学剥蚀过程极大地降低了烧蚀穿孔所需的能量,对激光辐照效应影响很大;功率密度较低时,烧蚀效率较高。
According to the experimental phenomena, the models and criteria for the calculation of mechanical erosion are proposed, which decompose the denudation process into two processes: material layering and layer fracture. The thermodynamic model of glass fiber / epoxy resin composite Calculation, the layer fracture process using the shell model calculation. The experimental results verify the rationality of the model. The calculation results show that the mechanical ablation process greatly reduces the energy required for ablation perforation, which has a great effect on the laser irradiation effect. When the power density is low, the ablation efficiency is high.