Evaluation of Mode II Interlaminar Fracture Toughness for Carbon Fabric/Epoxy Composites for Tilting Train Carbody

틸팅열차 차체8 탄소섬유직물/에폭시 복합재의 모우드 II 층간파괴인성 평가

  • 윤성모 (금오공과대학교 기계공학과) ;
  • 이은동 (금오공과대학교 기계공학과) ;
  • 허광수 (금오공과대학교 기계공학과) ;
  • 정종절 ((주)한국화이바 철도차량사업부) ;
  • 신광복 (한밭대학교 기계공학부)
  • Published : 2005.04.01

Abstract

Mode II interlaminar fracture behaviors of carbon fabric/epoxy composites, which are applicable to tilting train carbodies, was investigated by the ENF (End notched flexure) test. The specimens were made of CF3327 plain woven fabric with epoxy and a starter delamination at one end was made by inserting Teflon film with the thickness of 12.5$mu$m or 25.0$mu$m. The equation for mode II interlaminar fracture toughness was suggested based on the effective crack length from the compliance of load-displacement curve. Mode II interlaminar fracture toughness was evaluated for several types of the specimens. Also crack propagating behaviors and fracture surfaces were examined through an optical travelling scope and a scanning electron microscope.

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