A study on the fracture toughness of dynamic interlaminar for CFRP composite laminates

선진복합재료 적층판의 동적 층간 파괴 인성평가

  • 김지훈 (조선대학교 기계설계공학과) ;
  • 김영남 (조선대학교 기계설계공학과) ;
  • 양인영 (조선대학교 기계공학부) ;
  • 심재기 (조선대학교 기계공학부)
  • Published : 1998.12.01

Abstract

In this paper, an investigation was performed on the dynamic interlaminar fracture toughness of CFRP(carbon fiber reinforcement plastics) composite laminates. Composite laminates used in this experimentation are CF/EPOXY and CF/PEEK laminated plates. In the experiments, Split Hopkinson's Bar(SHPE) test was applied to dynamic and notched flexure test. The mode Ⅱ fracture toughness of each unidirectional CFRP was estimated by the analyzed deflection of the specimen and J-integral with the measured impulsive load and reactions at the supported points. As an experimental result, the vibration amplitude of CF/PEEK laminates appear more than that of CF/EPOXY laminates for the J-integral and displacement velocity at a measuring point. Also, it is thought that the dynamic fracture toughness of two kind specimens(CFRP/EPOXY and CF/PEEK) with the in crease of displacement velocity becomes a little greater at a measuring point within the range of measurement.

Keywords