Evaluation of Mode II Dynamic Interlaminar Fracture Toughness of Unidirectional CFRP Laminates

일방향 CFRP적층판의 모드II 동적 층간파괴인성 평가

  • Kim, Ji-Hoon (Department of Mechanical Design Engineering, Chosun University) ;
  • Jeong, Tae-Hoon (Department of Precision Mechanical Engineering, Chosun University) ;
  • Lee, Hyun (Regional Research Center, Chosun University) ;
  • Yang, In-Young (Division of Mechanical Engineering, Chosun University) ;
  • Cho, Gyu-Jae (Division of Mechanical Engineering, Chosun University) ;
  • Sim, Jae-Ki (Division of Mechanical Engineering, Chosun University)
  • 김지훈 (조선대학교 기계설계공학과) ;
  • 정태훈 (조선대학교 정밀기계공학과) ;
  • 이현 (조선대학교 수송기계부품 공장자동화 연구센터) ;
  • 양인영 (조선대학교 기계공학부) ;
  • 조규재 (조선대학교 기계공학부) ;
  • 심재기 (조선대학교 기계공학부)
  • Published : 2000.12.01

Abstract

In this paper, an investigation was performed on the ModeII dynamic interlaminar fracture toughness of unidirectional CFRP laminates. The stacking sequences used in this experiment are two kinds of [$0_20$] and [$0_{10}F_20_{10}$]. In the experiments, Split Hopkinson's Bar 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 results, the specimen [$0_{10}F_20_{10}$] appears greater than that of [$0_20$] for the J-integral and displacement velocity at a measuring point within the range of experiment.

Keywords

CFRP;dynamic interlaminar fracture toughness;split hopkinson's bar;integral ENF(End Notched Fracture)