A Study on the Impact Fracture Behavior of Glass Fiber Polyethylene Composites

GF/PE 복합재료의 충격파괴거동에 관한 연구

  • 엄윤성 (부경대학교) ;
  • 최영근 (부경대학교 대학원) ;
  • 양병춘 (부경대학교 대학원) ;
  • 김형진 (경상대학교 해양산업연구소) ;
  • 고성위 (부경대학교)
  • Published : 2003.08.01


Many of researches regarding mechanical properties of composite materials are associated with humid environment and temperature. Especially the temperature is a very important factor influencing the design of thermoplastic composites. However, the effect of temperature on impact behavior of reinforced composites have not yet been fully explored. An approach which predicts critical fracture toughness G$_{IC}$ was performed by the impact test in this work. The main goal of this work is to study the effect of temperature and span of specimen supports on the results of Charpy impact test for GF/PE composite. The critical fracture energy and failure mechanism of GF/PE composites were investigated in the temperature range of $60^{\circ}C;to;-50^{\circ}C$ by the Charpy impact test. The critical fracture energy showed the maximum at the ambient temperature, and it tended to decrease as the temperature increased or decreased from the ambient temperature. The major failure mechanisms are the fiber matrix debonding, the fiber pull-out and/or delamination and the matrix deformation.n.


impact test;fracture behavior;temperature effect;GF/PE composites;fracture mechanisms;critical fracture energy;SEM


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