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Impact Damage of Honeycomb Sandwich Antenna Structures

통신 안테나용 허니콤 샌드위치 구조물의 충격 손상에 관한 연구

  • Kim, Cha-Gyeom (Dept. of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Lee, Ra-Mi (Pohang University of Science and Technology) ;
  • Park, Hyeon-Cheol (Dept. of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Hwang, Un-Bong (Dept. of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Park, Wi-Sang (Pohang University of Science and Technology)
  • 김차겸 (포항공과대학교 기계공학과) ;
  • 이라미 (포항공과대학교 전자컴퓨터공학부) ;
  • 박현철 (포항공과대학교 기계공학과) ;
  • 황운봉 (포항공과대학교 기계공학과) ;
  • 박위상 (포항공과대학교 전자컴퓨터공학부)
  • Published : 2002.02.01

Abstract

The impact response and damage of CLAS panel was investigated experimentally. The facesheet material used was RO4003 woven-glass hydrocarbon/ceramic and the core material was Nomex honeycomb with a cell size of 3.2mm and a density of 96 kg/㎥. The shield plane used was RO4003 and 2024-T3 aluminum. Static indentation and impact test was conducted to characterize the type and extent of the damage observed in two CLAS panels, and the performance of antenna used in a wireless LAN system. Correlation of peak contact force, residual indentation and the delamination area shows impact damage of the panel with an aluminum shield plane is larger than that of the panel with RO4003 shield plane, although the former is more penetration resistant. The damage was observed by naked eye, ultrasonic inspection and cross sectioning. The shape and size of delamination was estimated by ultrasonic inspection, and the area of delamination linearly increases as impact energy increases. The performance of impact damaged antenna was estimated by measuring return loss and radiation pattern. It was revealed that the performance of antenna was related to the impact damage and there was a threshold that the performance of antenna fell as impact energy level changed. The threshold was between the impact energies of 1.5J and 1.75J.

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