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Fabrication of Metallic Sandwich Plates with Inner Dimpled Shell Structure and Static Bending Test

딤플형 내부구조 금속 샌드위치 판재의 제작 및 정적 굽힘 실험

  • 성대용 (한국과학기술원 기계공학과) ;
  • 정창균 (한국과학기술원 기계공학과) ;
  • 윤석준 (한국과학기술원 기계공학과) ;
  • 이상훈 (조선대학교 기계공학과) ;
  • 안동규 (조선대학교 기계공학과) ;
  • 양동열 (한국과학기술원 기계공학과)
  • Published : 2006.06.01

Abstract

Metallic sandwich plates with various inner cores have important new features with not only ultra-light material characteristics and load bearing function but also multifunctional characteristics. Because of production possibility on the large scale and a good geometric precision, sandwich plates with inner dimpled shell structure from a single material have advantages as compared with other solid sandwich plates. Inner dimpled shell structures can be fabricated with press or roll forming process, and then bonded with two face sheets by multi-point resistance welding or adhesive bonding. Elasto-plastic bending behavior of sandwich plates have been predicted analytically and measured. The measurements have shown that elastic perfectly plastic approximation can be conveniently employed with less than 10% error in elastic stiffness, collapse load, and energy absorption. The dominant collapse modes are face buckling and bonding failure after yielding. Sandwich plates with inner dimpled shell structure can absorb more energy than other types of sandwich plates during the bending behavior.

Keywords

Metallic Sandwich Plate;Inner Dimpled Shell Structure;Fabrication Process;Static Bending Test

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