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Prediction of weld shape for fiber laser keyhole welding based on finite element analysis

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Abstract

It is of great theoretical significance and engineering value to predict the weld shape for selecting welding parameters. A simplified and efficient three-dimensional (3D) heat conduction model was established to predict weld shape in fiber laser keyhole welding. An improved hybrid heat source model was proposed which consisted of a surface heat flux with a Gaussian distribution and a cylindrical heat source with damped peak value through the depth. The simulation results quite coincided with experimental ones, which indicated that the improved hybrid heat model can explain the energy absorption in keyhole more accurately. Both partially and fully penetrated weld shapes and sizes were predicted. The results showed that prediction errors of the sizes of weld cross-sections in partial-penetration welding were less than 8.9 %. While in full-penetrated welds, they were less than 8.8 % except for size of weld waist.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Huzhong University of Science and Technology, 430074, Wuhan, China

    Peiyun Xia, Fei Yan, Chunming Wang, Jianhua Liu, Xiyuan Hu & Shengyong Pang

  2. Shanghai Aerospace Equipment Manufacture Plant, Shanghai, China

    Peiyun Xia

  3. Southern Methodist University, Dallas, TX, USA

    Fanrong Kong

Authors
  1. Peiyun Xia
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  2. Fei Yan
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  3. Fanrong Kong
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  4. Chunming Wang
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  5. Jianhua Liu
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  6. Xiyuan Hu
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  7. Shengyong Pang
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Corresponding author

Correspondence to Chunming Wang.

Additional information

Peiyun Xia and Fei Yan contributed equally to this work.

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Xia, P., Yan, F., Kong, F. et al. Prediction of weld shape for fiber laser keyhole welding based on finite element analysis. Int J Adv Manuf Technol 75, 363–372 (2014). https://doi.org/10.1007/s00170-014-6129-4

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  • DOI: https://doi.org/10.1007/s00170-014-6129-4

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