Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Low Velocity Impact Behavior of Metallic Sandwich Plate with a Truss Core

트러스형 내부구조를 가지는 샌드위치 판재의 저속 충격 특성 연구

  • 정창균 (한국과학기술원 기계공학과 대학원) ;
  • 성대용 (한국과학기술원 기계공학과 대학원) ;
  • 양동열 (한국과학기술원 기계공학과) ;
  • 김진석 (조선대학교 기계설계공학과 대학원) ;
  • 안동규 (조선대학교 기계설계공학과)
  • Published : 2006.10.01
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Abstract

Metallic sandwich plate with a truss core has metallic inner structures which have low relative density between a pair of metal skin sheets or face sheets. In this work, low impact tests have been carried out to examine the behavior of sandwich plates with a pyramidal truss core. For the low velocity impact, the impact apparatus of drop weight type has been fabricated. From the results of the experiments, maximum energy absorption is found to happen when the upper sheet fails. The sandwich plate loses its absorption ability as soon as the inner structures have been crashed completely and optimal core thickness has existed to maximize energy absorption. Comparing the metallic sandwich plate with the monocoque plate, the absorbed energy has been improved up to 160 % and the deflection decreased by up to 76%. As a result, the metallic sandwich plate with a truss core is shown to have good material for impact resistance and energy absorption.

Keywords

References

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