Materials Transactions Online

Materials Transactions, Vol.44 No.9 (2003) pp.1857-1860
© 2003 The Japan Institute of Metals

Improved Strength in Carbon Fiber Reinforced Plastics due after Electron Beam Irradiation*

Akihiro Mizutani** and Yoshitake Nishi***

Department of Materials Science, Tokai University, Hiratsuka 259-1292, Japan

Carbon fiber reinforced plastics (CFRPs), with their advantages of light weight and high strength, are increasingly being applied as structural materials in the fields of aerospace engineering and rapid transport engineering. To strengthen CFRPs, electron beam (EB) irradiation is performed homogeneously. EB irradiation enhances the bending fracture stress and the bending fracture strain, and also slightly enhances the bending elasticity of CFRP. The analysis based on the Law of Mixture Strength for composites suggests that EB strengthening of CFRPs is chiefly attributable to ductility enhancement of the epoxy resin and carbon fiber.

(Received April 21, 2003; Accepted July 1, 2003)

Keywords: carbon fiber reinforced plastics, electron beam irradiation, bending, fracture, stress-strain curves, law of mixture strength

*This Paper was Partly Presented at the Autumn Meeting of the Japan Institute of Metals, held in Suita, on Published (November 2, 2002) and a summary was Published in Japanese in J. Japan Inst. Metals, 67 (2003) 201-204.
**Graduate Student, Tokai University.
***Corresponding author, E-mail:

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