International Journal of Naval Architecture and Ocean Engineering

  • 제6권2호
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  • Pages.245-256
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  • 2014
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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A study on an efficient prediction of welding deformation for T-joint laser welding of sandwich panel Part II : Proposal of a method to use shell element model

  • Kim, Jae Woong (Gas Technology R&D Group, Daewoo Shipbuilding & Marine Engineering Co., Ltd.) ;
  • Jang, Beom Seon (RIMSE, Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Kang, Sung Wook (RIMSE, Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • 발행 : 2014.06.30
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초록

I-core sandwich panel that has been used more widely is assembled using high power $CO_2$ laser welding. Kim et al. (2013) proposed a circular cone type heat source model for the T-joint laser welding between face plate and core. It can cover the negative defocus which is commonly adopted in T-joint laser welding to provide deeper penetration. In part I, a volumetric heat source model is proposed and it is verified thorough a comparison of melting zone on the cross section with experiment results. The proposed model can be used for heat transfer analysis and thermal elasto-plastic analysis to predict welding deformation that occurs during laser welding. In terms of computational time, since the thermal elasto-plastic analysis using 3D solid elements is quite time consuming, shell element model with multi-layers have been employed instead. However, the conventional layered approach is not appropriate for the application of heat load at T-Joint. This paper, Part II, suggests a new method to arrange different number of layers for face plate and core in order to impose heat load only to the face plate.

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참고문헌

  1. Kim, J.W., Jang, B.S., Kim, Y.T. and Chun, K.S., 2013. A study on an efficient prediction of welding deformation for Tjoint laser welding of sandwich panel, PART I : Proposal of a heat source model. International Journal of Naval Architecture and Ocean Engineering, 5(3), pp.348-363. https://doi.org/10.3744/JNAOE.2013.5.3.348
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