Numerical simulation of laser heating of metal with three absorptivity models
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1.
School of Science, Nanjing University of Science & Technology, Nanjing 210094, China;
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2.
School of Science, Changchun University of Science & Technology, Changchun 130022, China
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Corresponding author:
LU Jian, lujian@mail.njust.edu.cn
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Received Date:
2008-10-06
Accepted Date:
2008-11-06
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Abstract
There are three absorptivity models,i.e.the single constant absorptivity model,assembled constant absorptivity model whose liquid-state and solid-state absorptivity are both constant and temperature-dependent absorptivity models.In order to compare the influences of the three models on the numerical results,a spatial axis-symmetric finite element calculation model was established based on the three absorptivity models respectively.The laser heating process of an aluminum plate was simulated and the three numerical results were compared.The advantages and disadvantages and the application scope of the three absorptivity models were discussed.The results show that for the heating process of both solid state and liquid state existing evidently,the computed results based on the assembled constant absorptivity model are similar with those based on the temperature-dependent model.However,for the heating process of only one single physical state existing,the computed results based on the constant absorptivity model are a little different with those based on the temperature-dependent model.
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References
|
[1]
|
SHEN X F,WANG Y,YAO J,et al.Finite element simulation of thermal stress distribution in direct metal laser sintering[J].Laser Technology,2005,29(4):343-346(in Chinese). |
|
[2]
|
LONG R Sh,LIU W J,SHANG X F.Numerical simulation of temperature field on laser metal deposition shaping[J].Laser Technology,2007,31(4):394-396(in Chinese). |
|
[3]
|
LU J,NI X W,HE A Zh.Interaction physics between laser and materials[M].Beijing:Machinery Industry Press,1996:19-22(in Chinese). |
|
[4]
|
ZUO T Ch.Laser materials processing of high strength aluminum alloys[M].Beijing:National Defense Industry Press,2002:20-21(in Chinese). |
|
[5]
|
LIN X Ch,SHAO T M.Lumped method for the measurement of laser absorptance of materials[J].Acta Physica Sinica,2001,50(5):856-859(in Chinese). |
|
[6]
|
ZOU D N,LEI Y P,LIANG G Y,et al.Determination of laser absorptivity of metal by numerical calculation technique and trial-and-error method[J].Acta Metallurgica Sinica,2001,37(7):737-740(in Chinese). |
|
[7]
|
HUANG Y L,YANG F H,LIANG G Y,et al.Using in-situ technique to determine laser absorptivity of Al-alloys[J].Chinese Journal of Lasers,2003,30(5):449-453(in Chinese). |
|
[8]
|
CHEN W L,YANG Y Ch,LEE H L.Estimating the absorptivity in laser processing by inverse methodology[J].Applied Mathematics and Computation,2007,190(1):712-721. |
|
[9]
|
KONG X Q.The application of the finite element method in heattransfer[M].Beijing:Science Press,1998:204(in Chinese). |
|
[10]
|
FANG K F.Handbook of engineering materials (volume:nonferrous metal)[M] Beijing:Beijing Publishing House,2002:580-585(in Chinese). |
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