Impact Damage of CFRP Reinforced with a Carbon Fiber Cloth.

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  • TANABE Yasuhiro
    Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology
  • ISHIMOTO Takuji
    Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology
  • AKATSU Takashi
    Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology
  • YASUDA Eiichi
    Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology

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Other Title
  • 炭素繊維織物を用いたＣＦＲＰの衝撃損傷
  • タンソ センイ オリモノ オ モチイタ CFRP ノ ショウゲキ ソンショウ

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Abstract

CFRPs, reinforced with fibers having different modules/strain-to-breaks but a similar strength, were impacted by a 4 mm diameter steel sphere at a velocity of 900 m/s to 1, 800 m/s. Spall area and kinetic energy absorption of the sphere by CFRPs were investigated. In this velocity range, energy absorption ratio was independent with impact velocity in both CFRPs. A fiber cloth and a CFRP with low modules, i.e., high strain-to-breaks showed a high-energy absorption. Spall area increased with increasing specimen thickness. Tensile-stress applied areas simulated by a computer code also increased; The tendency of the experiments and simulation was quite similar. Most kinetic energy of spheres was absorbed at early stage of the impact.

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