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

일방향 CFRP적층판의 모드II 동적 층간파괴인성 평가

  • Kim, Ji-Hoon ;
  • Jeong, Tae-Hoon ;
  • Lee, Hyun ;
  • Yang, In-Young ;
  • Cho, Gyu-Jae ;
  • Sim, Jae-Ki
  • 김지훈 ;
  • 정태훈 ;
  • 이현 ;
  • 양인영 ;
  • 조규재 ;
  • 심재기
  • 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)