On the Tensile Load to Elongation Response of Carbon Fibre Single Filament Samples

Tensile modulus of elasticity for unidirectional carbon fibre composites increases proportionally with increasing stress (or strain). This phenomenon has been known as a stress stiffening effect. In the present paper tensile load to elongation response for carbon fibre single filament samples was studied precisely by a mechanical measurement technique. It was found that the stress induced stiffening effect is intrinsic characteristics of the carbon fibre.