【摘要】 本文对连续激光辐照金属材料的峰值温度变化情况进行研究,建立了连续激光辐照材料的有限元分析模型,采用仿真分析的方法对连续激光照射铝合金圆板的峰值温度变化情况进行了研究。通过对光束抖动、光斑扩散、空气对流、材料表面氧化等不同条件仿真结果的分析,给出了各种因素对激光辐照材料峰值温度变化情况的影响,并利用等效材料比热容的方法开展了相变潜热对温升情况的影响分析。最后综合各种条件给出了在连续激光辐照铝合金材料的峰值温度变化情况,对材料的损伤进行了分析。更多还原

【Abstract】 The variation of peak temperature of metal materials irradiated by continuous wave(CW) laser is studied in this paper. We established a finite element model of metal materials irradiated by CW laser. The variation of peak temperature of aluminum alloy circular plates irradiated by CW laser is studied by simulation analysis method. By analyzing the simulation results under different conditions, such as beam drift, spot diffusion, air convection and material surface oxidation, the effects of various factors on the peak temperature of laser-irradiated materials are given, and the influence of latent heat of phase change on temperature rise is analyzed by using the method of equivalent material specific heat capacity. Finally, according to various conditions, the change of peak temperature of aluminum alloy irradiated by CW laser is given, and the damage of aluminum alloy is analyzed.更多还原