Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Analytic springback prediction in cylindrical tube bending for helical tube steam generator

  • Ahn, Kwanghyun (SMART Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Lee, Kang-Heon (SMART Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Lee, Jae-Seon (SMART Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Won, Chanhee (Department of Mechanical Design Engineering, Hanyang University) ;
  • Yoon, Jonghun (Department of Mechanical Engineering, Hanyang University)
  • Received : 2019.11.22
  • Accepted : 2020.02.10
  • Published : 2020.09.25
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Abstract

This paper newly proposes an efficient analytic springback prediction method to predict the final dimensions of bent cylindrical tubes for a helical tube steam generator in a small modular reactor. Three-dimensional bending procedure is treated as a two-dimensional in-plane bending procedure by integrating the Euler beam theory. To enhance the accuracy of the springback prediction, mathematical representations of flow stress and elastic modulus for unloading are systematically integrated into the analytic prediction model. This technique not only precisely predicts the final dimensions of the bent helical tube after a springback, but also effectively predicts the various target radii. Numerical validations were performed for five different radii of helical tube bending by comparing the final radius after a springback.

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References

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