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<p>The objective of this study is to develop an effective equivalent damage model for sandwich panels used in impact limiters of spent nuclear fuel (SNF) casks. The sandwich panels consist of SUS304 facesheets and core absorber materials. To establish the damage model, material property tests were conducted on balsa wood and urethane foam. Furthermore, low-velocity impact tests were performed on both the absorber materials and sandwich panels using an impact testing machine at three different energy levels. The experimental results were compared with finite element analysis. The analysis were conducted using the explicit finite element method (FEM) code LS-DYNA 3D. The time histories of contact forces obtained from the low-velocity impact tests were evaluated and compared with the simulation results. The comparisons showed good agreement between experimental and numerical analysis, confirming that the developed model accurately predicts the impact response of sandwich panels used in SNF cask impact limiters. Uniaxial and volumetric compression tests were conducted to investigate the compressive behavior of fenosol foam as a next-generation impact absorbing material. Also, Material cards for foam materials in LS-DYNA were examined to identify those showing behavior similar to fenosol foam. Among the available material models commonly used for foam, the MAT_063 (CRUSHABLE FOAM) model was identified as the most suitable for representing the behavior of fenosol foam.</p>

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Finite element analysis of conventional impact absorbing materials and mechanical evaluation of fenosol foam applied to nuclear fuel transport casks

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Chang Ho Kim,
  • Yeong Hwan Jeon,
  • Seung Gu Kang,
  • Jae Moon Im,
  • Kwang Bok Shin

摘要

The objective of this study is to develop an effective equivalent damage model for sandwich panels used in impact limiters of spent nuclear fuel (SNF) casks. The sandwich panels consist of SUS304 facesheets and core absorber materials. To establish the damage model, material property tests were conducted on balsa wood and urethane foam. Furthermore, low-velocity impact tests were performed on both the absorber materials and sandwich panels using an impact testing machine at three different energy levels. The experimental results were compared with finite element analysis. The analysis were conducted using the explicit finite element method (FEM) code LS-DYNA 3D. The time histories of contact forces obtained from the low-velocity impact tests were evaluated and compared with the simulation results. The comparisons showed good agreement between experimental and numerical analysis, confirming that the developed model accurately predicts the impact response of sandwich panels used in SNF cask impact limiters. Uniaxial and volumetric compression tests were conducted to investigate the compressive behavior of fenosol foam as a next-generation impact absorbing material. Also, Material cards for foam materials in LS-DYNA were examined to identify those showing behavior similar to fenosol foam. Among the available material models commonly used for foam, the MAT_063 (CRUSHABLE FOAM) model was identified as the most suitable for representing the behavior of fenosol foam.