Degradation Behaviour of Fiber Reinforced Plastic under Electron Beam Irradiation

J-STAGE
  • Sonoda Katsumi
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory
  • Yamamoto Yasushi
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory
  • Hashimoto Osamu
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory
  • Ono Toshio
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory
  • Tomita Haruhiko
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory
  • Udagawa Akira
    Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment
  • Egusa Shigenori
    Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment
  • Sasuga Tsuneo
    Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment
  • Seguchi Tadao
    Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment
  • Tamura Naoyuki
    Mitsubishi Electric Corporation, Manufacturing Development Laboratory

抄録

Various mechanical properties of four kinds of glass fiber-reinforced plasrics irradiated with electron beams were examined at three temperatures; room temperature, 123 K and 77 K. Dynamic viscoelastic properties were measured, and fractography by means of scanning electron microscopy was observed in order to clarify degradation behaviour. A considerable decrease in interlaminar shear strength (ILSS) at room temperature was observed above 60 MGy. On the other hand, the three-point bending strength at 77 K and the ILSS at 123 K decreased with increasing irradiation. Fractography reveals that the degradation of the interface layer between matrix resin and fiber plays an important role in the strength reduction at 123 K and 77 K. These findings suggest that the interface between matrix resin and fiber loses its bondability at 123 K arid 77 K after electron beam irradiation.

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