Abstract
Friction between carbon fibres or tows often occurs during the implementation of Carbon Fibres Reinforced Polymer. Defects are due to these friction phenomena that can reduce the mechanical properties and the lifetime of the final parts. This study has been conducted to study the friction behaviour between carbon fibres or carbon tows with an angle of 90°. The coefficient of friction (COF) of 3 types of carbon fibres differentiated by their Young’s Modulus is determined thanks to an experimental device dedicated to this study. It consists in rubbing 2 tows or 2 yarns together with an angle of 90°. A particularity of this study is a work conducted on single fibres whose diameter is small up to 4.9 flm. For single fibre as for tow, there is no influence of friction velocity and normal load. It has been shown the COF is higher at tow scale because of fibrous rearrangement. As the Young’s Modulus increases, the COF between single fibres decreases. At tow scale, no influence is highlighted. Moreover, this study highlights the sizing treatment is damaged during a friction test and can participate to the evolution of the COF.
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