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利用ANSYS有限元分析软件对存在线损伤的铝合金薄板脉冲激光修复过程中的温度场进行了数值模拟。综合考虑了材料热物性参数、边界条件、相变潜热等因素,建立了表面高斯热源+三维锥体热源模型,两个热源功率分配比为1∶9,并对模拟结果进行了试验验证。结果表明,数值模拟计算的熔宽和熔池形貌与试验获得结果吻合较好,说明温度场数值模型和热源模型能够较准确地反映线损伤铝合金薄板脉冲激光修复过程的温度场,可用作此类铝合金薄板脉冲激光修复过程分析及工艺参数优化。
ANSYS finite element analysis software was used to simulate the temperature field in the process of pulsed laser repairing of aluminum alloy sheet with wire damage. Considering the thermophysical parameters, boundary conditions and latent heat of transformation, a Gaussian heat source + three-dimensional pyramid heat source model was established. The power distribution ratio of two heat sources was 1: 9. The simulation results were verified by experiments. The results show that the calculated melt width and the shape of the weld pool are in good agreement with the experimental results, which shows that the numerical simulation of the temperature field and the heat source model can accurately reflect the temperature field of the pulsed laser repair process of the wire-damaged aluminum alloy sheet, Analysis of pulsed laser repairing process and optimization of process parameters for such aluminum alloy sheet.