Impact Properties of CFRP Laminates with Initial Fiber Failures

강화재파단이 있는 복합재료의 저속 충격특성

  • 박중권 (국민대학교 대학원 기계설계) ;
  • 강창규 (국민대학교 대학원 기계설계) ;
  • 김철 (국민대학교 기계자동차공학부) ;
  • 김태우 (국민대학교 기계자동차공학부)
  • Published : 2005.04.29

Abstract

The carbon fiber reinforced/epoxy laminated composites were fabricated with initial fiber failures within the unidirectional fiber pre-pregnated ply. The fiber failures were made intentionally either parallel to and/or perpendicular to the unidirectional fibers within the ply. The pre-made clear-cut cracks were found to be healed partially after laminating process. The laminates were impacted with or without initial fiber failures within the laminates. The force versus deflection curves were compared. The partially healed laminates showed the reduced laminate stiffness as compared to those without any intentional fiber failures. The impact curves were compared with size and the location of the initial failures varied.

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