Chinese Journal of Lasers, Volume. 49, Issue 2, 0202004(2022)

Dynamic Simulation of Laser Perforation Based on Dynamic Phase-Interface-Based Heat Source Model

Fangchao Xu1, Zhidong Wang1, Ling Tong1、*, Zhe Xu1, Feng Sun1, and Xiaoyou Zhang2
Author Affiliations
  • 1School of Mechanical Engineering Shenyang University of Technology, Shenyang, Liaoning 110870, China
  • 2Department of Mechanical Engineering Japan University of Technology, Saitama 345-8501, Japan
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    Figures & Tables(23)
    Principle of laser perforation. (a) Early stage of perforation; (b) middle stage of perforation; (c) time of perforation; (d)schematic diagram of phase-interface-based heat source model
    Laser perforation model. (a) Laser perforation geometric model; (b) symmetrical section of laser perforation geometric model; (c) grid model
    Diagram of interface between iron and gas phases
    Flow chart of numerical calculation of laser perforation
    Cloud diagram of iron phase and gas phase at different time. (a) t=0.022 s; (b) t=0.044 s; (c) t=0.088 s; (d) t=0.1102 s
    Temperature field distribution nephogram at different time when x=0.005 m. (a) t=0.044 s; (b) t=0.066 s; (c) t=0.088 s; (d) t=0.11 s
    Temperature distribution on laser axis at different time
    Cloud chart of the integral number of the melt. (a) t=0.044 s; (b) t=0.066 s; (c) t=0.088 s; (d) t=0.11 s
    Cloud diagram of iron phase distribution at perforation time
    Temperature distribution at perforation time
    Temperature distribution on different horizontal lines
    Pressure distribution nephogram at different time. (a) t=0.044 s; (b) t=0.066 s; (c) t=0.088 s; (d) t=0.11 s
    Velocity nephogram at different time, (a) t=0.044 s; (b) t=0.066 s; (c) t=0.088 s; (d) t=0.11 s
    Pressure distribution on laser axis (x=0.005 m)
    Velocity distribution on the laser axis (x=0.005 m)
    Velocity distribution of auxiliary gas on laser axis (x=0.005 m)
    Velocity distribution of auxiliary gas in y direction along the horizontal line of y=0.0025 m
    Laser perforation section
    Cross section morphology of laser perforation with different hole depths. (a) H=1594 μm; (b) H=1963 μm; (c) experimental simulation comparison; (d) H=1594 μm recast layer range; (e) H=1963 μm recast layer range
    • Table 1. Physical parameters of solid iron and molten iron

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      Table 1. Physical parameters of solid iron and molten iron

      Physical parameters of solid iron Physical parameters of molten iron 
      Solid density /(kg·m-3)7850Liquid density /(kg·m-3)7800
      Specific heat of solid phase /[J·(kg·K)-1]480Specific heat of liquid phase /[J·(kg·K)-1]480
      Thermal conductivity of solid phase / [W·(m·K)-1]81Liquid thermal conductivity/ [W·(m·K)-1]81
      Latent heat of melting /(J·kg-1)275000Liquid viscosity /[kg·(m·s)-1]0.001
      Surface tension coefficient /(N·m-1)2.07Liquidus temperature /K1820
      Solidus temperature /K1800Vaporization temperature /K3023
    • Table 2. Physical parameters of auxiliary gas

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      Table 2. Physical parameters of auxiliary gas

      Physical parametersValue
      Density /(kg·m-3)1.225
      Specific heat /[J·(kg·K)-1]1006.43
      Thermal conductivity / [W·(m·K)-1]0.0242
      Viscosity /[kg·(m·s)-1]1.789×10-5
    • Table 3. Operation and environmental parameters

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      Table 3. Operation and environmental parameters

      Physical parametersValue
      Operating pressure /Pa101325
      Acceleration of gravity /(m·s-2)9.81
      Auxiliary gas pressure /MPa0.5
      Thickness of steel sheet /mm3
      Heat source power /(W·m-3)3×1012
      Nozzle diameter /mm1.5
      Operating temperature /K299.18
    • Table 4. Hole center temperature on different horizontal lines

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      Table 4. Hole center temperature on different horizontal lines

      LevelHole center temperature
      y=0 m1502.41
      y=0.0005 m784.41
      y=0.001 m463.14
      y=0.0015 m426.81
      y=0.002 m406.02
      y=0.0025 m349.39
      y=0.003 m300.04
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    Fangchao Xu, Zhidong Wang, Ling Tong, Zhe Xu, Feng Sun, Xiaoyou Zhang. Dynamic Simulation of Laser Perforation Based on Dynamic Phase-Interface-Based Heat Source Model[J]. Chinese Journal of Lasers, 2022, 49(2): 0202004

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    Paper Information

    Category: laser manufacturing

    Received: Mar. 2, 2021

    Accepted: May. 12, 2021

    Published Online: Dec. 1, 2021

    The Author Email: Tong Ling (tonglingsy@163.com)

    DOI:10.3788/CJL202249.0202004

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