Welding in the World

, Volume 57, Issue 2, pp 223–233 | Cite as

Simulations of weld pool dynamics in V-groove GTA and GMA welding

  • Dae-Won Cho
  • Suck-Joo Na
  • Min-Hyun Cho
  • Jong-Sub Lee
Research Paper

Abstract

Introduction

Many simulation models use an axisymmetric arc model for heat flux, arc pressure, and electromagnetic force. In V-groove welding, however, an elliptically symmetric arc model is more acceptable than an axisymmetric model. An elliptically symmetric arc model can be established by applying the Abel inversion method to CCD images of welding arc on V-groove.

Methods

This study uses an elliptically symmetric arc model for CFD based simulations of fluid flow behavior in weld pool of GMA V-groove welding. It recommends a new method of calculating the electromagnetic force distribution in V-groove welding.

Conclusion

A volume of fluid method is used to describe the molten pool flow in numerical simulations.

Keywords (IIW Thesaurus)

Arc welding Electromagnetic fields Simulating 

References

  1. 1.
    Cho DW, Na SJ, Lee MY (2009) Expectation of bead shape using non-linear multiple regression and piecewise cubic hermite interpolation in FCA fillet pipe welding. J KWJS 27(5):42–48, in KoreanGoogle Scholar
  2. 2.
    Cho DW, Na SJ, Cho MH, Lee MY (2011) A study on molten pool flow for various welding positions of V-groove GMA pipe welding, IIW conference, IstanbulGoogle Scholar
  3. 3.
    Zhang W, Kim CH, DebRoy T (2004) Heat and fluid flow in complex joints during gas metal arc welding part II. J Appl Phys 95(9):5220–5229CrossRefGoogle Scholar
  4. 4.
    Hu J, Tsai HL (2008) Modeling of transport phenomena in 3D GMAW of thick metals with V groove. J Phys D Appl Phys 41(6):065202CrossRefGoogle Scholar
  5. 5.
    Cho YT, Na SJ (2005) Application of Abel inversion in real-time calculations for circularly and elliptically symmetric radiation sources. Meas Sci Technol 16(3):878–884CrossRefGoogle Scholar
  6. 6.
    Cho WI, Na SJ, Cho MH, Lee JS (2010) Numerical study of alloying element distribution in CO2 laser–GMA hybrid welding. Comput Mater Sci 49(4):792–800CrossRefGoogle Scholar
  7. 7.
    Cho JH, Na SJ (2009) Three-dimensional analysis of molten pool in GMA-laser hybrid welding. Weld J 88(2):35s–43sGoogle Scholar
  8. 8.
    Cho MH, Lim YC, Farson DF (2006) Simulation of weld pool dynamics in the stationary pulsed gas metal arc welding process and final weld shape. Weld J 85(12):271s–283sGoogle Scholar
  9. 9.
    Dupont JN, Marder AR (1995) Thermal efficiency of arc welding processes. Weld J 74(12):406s–416sGoogle Scholar
  10. 10.
    Reddy AA, Guha B, Achar DRG (2002) Finite Element modeling of three-dimensional transient heat transfer in stainless steel (304) pulsed GTA weldments. Numer Heat Tran Part A 41(1):41–46CrossRefGoogle Scholar
  11. 11.
    Lin ML, Eagar TW (1986) Pressures produced by gas tungsten arcs. Metall Mater Trans B 17(3):601–607CrossRefGoogle Scholar

Copyright information

© International Institute of Welding 2013

Authors and Affiliations

  • Dae-Won Cho
    • 1
  • Suck-Joo Na
    • 1
  • Min-Hyun Cho
    • 2
  • Jong-Sub Lee
    • 2
  1. 1.Department of Mechanical EngineeringKAISTDaejeonRepublic of Korea
  2. 2.Technical Research LaboratoriesPOSCOPohangRepublic of Korea

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