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Applied Physics 2024
纳秒脉冲激光除漆过程中作用机制的仿真研究
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Abstract:
本文利用有限元法建立了纳秒脉冲激光去除铝合金表面漆层的烧蚀模型和应力模型，通过改变重频率得到不同的温度和应力变化趋势，从而分析了激光作用时间为1 s、激光能量密度为20 J/cm2时的脱漆机理。仿真结果表明，当脉冲重复频率6 Hz以下时应力作用去除漆层占主导地位；脉冲重复频率6 Hz及以上时，烧蚀作用去除漆层占主导地位。为激光清洗技术提供了可靠的理论支撑和一定的工艺参数。
In this paper, the ablation model and stress model of nanosecond pulse laser to remove the paint layer on the surface of aluminum alloy is established by using the finite element method, and different temperature and stress trends are obtained by changing the repetition frequency, to analyze the paint stripping mechanism when the laser action time is 1 s and the laser energy density is 20 J/cm2. The simulation results show that when the pulse repetition frequency is less than 6 Hz, the stress action is dominant to remove the paint layer. At a pulse repetition rate of 6 Hz and above, ablation removes the paint layer dominantly. It provides reliable theoretical support and certain process parameters for laser cleaning technology.
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