Advanced Composite Materials

The Korean Society for Composite Materials (한국복합재료학회)
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Experimental and Numerical Simulation Studies of Low-Velocity Impact Responses on Sandwich Panels for a BIMODAL Tram

  • Lee, Jae-Youl (Graduate School of Mechanical Engineering, HANBAT National University) ;
  • Shin, Kwang-Bok (Division of Mechanical Engineering, HANBAT National University) ;
  • Jeong, Jong-Cheol (Transit Division, HanKuk Fiber Glass Co., Ltd.)
  • Received : 2007.10.26
  • Accepted : 2008.01.14
  • Published : 2009.03.01
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Abstract

This paper describes the results of experiments and numerical simulation studies on the impact and indentation damage created by low-velocity impact subjected onto honeycomb sandwich panels for application to the BIMODAL tram. The test panels were subjected to low-velocity impact loading using an instrumented testing machine at six energy levels. Contact force histories as a function of time were evaluated and compared. The extent of the damage and depth of the permanent indentation was measured quantitatively using a 3-dimensional scanner. An explicit finite element analysis based on LS-DYNA3D was focused on the introduction of a material damage model and numerical simulation of low-velocity impact responses on honeycomb sandwich panels. Extensive material testing was conducted to determine the input parameters for the metallic and composite face-sheet materials and the effective equivalent damage model for the orthotropic honeycomb core material. Good agreement was obtained between numerical and experimental results; in particular, the numerical simulation was able to predict impact damage area and the depth of indentation of honeycomb sandwich composite panels created by the impact loading.

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