Degradation Behaviour of Fiber Reinforced Plastic under Electron Beam Irradiation

• Published in: Japanese Journal of Applied Physics 1989-10, Vol.28 (10R), p.1950-1956
• Main Authors: Sonoda, Katsumi, Yamamoto, Yasushi, Hashimoto, Osamu, Ono, Toshio, Tomita, Haruhiko, Udagawa, Akira, Egusa, Shigenori, Sasuga, Tsuneo, Seguchi, Tadao, Tamura, Naoyuki
• Format: Article
• Language: English
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.28.1950

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.