• Study on the Durability of Carbon Fiber/Epoxy Composite by Two Fiber Fragmentation Test
  • Moon CK, Moon SH, SE CS, Cho HH
  • 두 섬유 Fragmentatior 시험법에 의한 탄소섬유/에폭시 복합재료의 내구성에 관한 연구
  • 문창권, 문상현, 서차수, 조현혹
Abstract
Two fiber fragmentation technique was used to investigate the influence of hydrothermal on the interfacial shear strength in the carbon fiber/epoxy system. The uptake of water (wt%) and interfacial shear strength were evaluated up to 60 days of immersion time in distilled water at 75℃ using two fiber fragmentation test specimens of dogbone shape. As a result, it was found that moisture absorption of two fiber doggone specimens increased with time of exposure to hydrothermal. This induced to increase the average critical aspect ratio (Lc/Df) of the fiber fragments. The increase of Lc/Df for hydrothermally treated samples indicated the decrease of the interfacial shear strength by increasing of moisture absorption.

탄소섬유/에폭시 복합재료에서 계면전단강도의 수분에 대한 내구성을 조사하기 위해 두섬유 fragmentation 시험법을 사용하였다. Dogbone형의 두섬유 fragmentation 시험편을 제작하여 75℃의 증류수에 60일까지 침지시켜 수분 흡수량을 측정하였으며, 수분 흡수량에 따른 계면특성 및 계면전단강도를 평가하였다. 그 결과, 침지시간의 경과에 따라 시험편에 흡수된 수분량은 증가하였고, 이러한 수분 흡수량의 증가는 섬유와 수지의 계면을 열화시켜 파단된 섬유길이의 임계 aspect ratio (임계섬유장/섬유직경)를 증가시켰으며, 이것은 곧 수분흡수량의 증가에 의해 복합재료에서 계면전단강도의 감소를 나타내는 것이다.

Keywords: hydrothermal; fragmentation test; interfacial shear strength; durability; degradation

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 1996; 20(1): 116-125

    Published online Jan 25, 1996