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Effects of heat source geometric parameters and arc efficiency on welding temperature field, residual stress, and distortion in thin-plate full-penetration welds

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Abstract

The Goldak’s double-ellipsoid volumetric heat source model is commonly used for arc welding in numerical simulation. Usually, heat source geometric parameters and arc efficiency need to be calibrated in thermal analysis until a good agreement with experiments is achieved. However, the influence of individual heat source geometric parameters and arc efficiency on welding temperature field, residual stress, and distortion is still unclear. In this study, this influence has been systematically investigated in a thin-plate full-penetration weld by methods of both numerical simulation and experimental method. The predicted and measured results indicate that the location of HAZ boundary and the Δt8/5 time can only be influenced by arc efficiency (significantly) and heat source width (slightly) in thin-plate full-penetration welds. Furthermore, the variation of arc efficiency can significantly affect welding residual stress and distortion, while the reasonable change of heat source geometric parameters has a slight effect. In this study, a calibration procedure of heat input model in FE simulation of thin-plate full-penetration welds is provided.

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Acknowledgements

Special thanks to the China Scholarship Council (CSC) for its financial support.

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Authors and Affiliations

  1. Institute of Joining and Welding, Braunschweig University of Technology, Langer Kamp 8, 38106, Braunschweig, Germany

    Jiamin Sun, Jakob Klassen, Thomas Nitschke-Pagel & Klaus Dilger

Authors
  1. Jiamin Sun
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  2. Jakob Klassen
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  3. Thomas Nitschke-Pagel
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  4. Klaus Dilger
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Corresponding author

Correspondence to Jiamin Sun.

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Highlights

1. The effect of individual heat source geometric parameters and arc efficiency on welding temperature field is clarified.

2. The influence mechanism of heat source geometric parameters and arc efficiency on welding residual stress and distortion is discussed.

3. A calibration procedure of heat input model in FE simulation of thin-plate full-penetration welds is provided.

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Sun, J., Klassen, J., Nitschke-Pagel, T. et al. Effects of heat source geometric parameters and arc efficiency on welding temperature field, residual stress, and distortion in thin-plate full-penetration welds. Int J Adv Manuf Technol 99, 497–515 (2018). https://doi.org/10.1007/s00170-018-2516-6

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  • DOI: https://doi.org/10.1007/s00170-018-2516-6

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