A Study on Low-Velocity Impact Characterization of Various Sandwich Panels for the Korean Low Floor Bus Application

초저상 버스 차체 적용을 위한 샌드위치 패널들의 저속충격 특성 연구

  • 이재열 (한밭대학교, 기계설계공학과 대학원) ;
  • 이상진 (한국화이바(주), 차량사업부) ;
  • 신광복 (한밭대학교, 기계설계공학과)
  • Published : 2007.04.01


In this paper, a study on low-velocity impact response of four different sandwich panels for the hybrid bodyshell and floor structure application of the Korean low floor bus vehicle was done. Square samples of 100mm sides were subjected low-velocity impact loading using an instrumented testing machine at six energy levels. Impact parameters like maximum force, time to maximum force, deflection at maximum force and absorbed energy were evaluated and compared for four different types of sandwich panels. The impact damage size and depth of the permanent indentation were measured by 3-Dimensional Scanner. Failure modes were studied by sectioning the specimens and observed under optical microscope. The impact test results show that sandwich panel with composite laminate facesheet could not observe damage mode of a permanent visible indentation after impact and has a good impact damage resistance in comparison with sandwich panel with metal aluminum facesheet.


Composite Material;Impact Damage;Low Floor Bus;Low-Velocity Impact;Sandwich Panel


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