Effects of surface and sizing treatments on axial compressive strength of carbon fibres

✍ Scribed by M. Miwa; A. Takeno; Y. Mori; T. Yokoi; A. Watanabe

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 614 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356008

✦ Synopsis

Attempts have been made to estimate the fibre axial compressive strength of pitch-based graphitized fibres, and the effects of surface-and size-treatment on compressive strength was investigated. The estimated compressive strength of fibres decreases with increasing temperature. This decrease in compressive strength may be accounted for by a decrease in the radial compression force owing to a decrease in the residual thermal stress and a decrease in Young's modulus of the resin matrix. There is a linear relationship between the estimated compressive strength and radial compression force in a temperature range from room temperature to 80 ~ The real compressive strength of the fibres, determined by extrapolating this straight line until the radial compression force is zero, increases with increasing shear yield strength at the fibre-matrix interphase. In order to obtain reinforcing fibres with a higher compressive strength, it will be necessary to surface-and size-treat the fibres.