곡률반경을 갖는 CFRP 적층쉘의 충격손상

Impact Damage of CFRP Laminated Shells with the Curvature

  • 황재중 (조선대 대학원 기계설계공학과) ;
  • 이길성 (조선대 대학원 기계설계공학) ;
  • 김영남 (조선대 대학원 기계설계공학) ;
  • 나승우 (순천제일대 차량기계학) ;
  • 심재기 (조선대 기계전기공학) ;
  • 양인영 (조선대 기계정보공학과)
  • 발행 : 2003.06.01

초록

Studies on impact damage of composite laminate shells were fewer compared with those on impact behaviors to analyze time-load, displacement-load and impact energy - energy absorption. Up to date the studies were not enough to demonstrate suitability of their results because they were dependent on theories and numerical analyses. In particular, it is a well-known fact that there was a correlation between initial peak load and damage resistance of composite material flat plates imposed with low-speed impact, but studies on composite material shells with curvature were also very few. Actually structures such as wings or moving bodies of airplanes, motor cases and pressure containers of rockets are circular. And as low-speed impact load is imposed for optimal design of take-off and landing, and containers of airplanes, it is very important to analyze evaluation of behaviors and damaged areas. Therefore, in this paper to evaluate the impact characteristics of the CFRP laminate shell according to size of curvature quantitatively, it was to identify energy absorption and impact damage instruments according to change of impact speed.

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