Weibull parameters determined from a comprehensive dataset of tensile testing of single carbon fibres

This data article presents tensile properties of about 1200 single carbon fibres (PYROFIL™ TRW40 50L) tested at eight different gauge lengths in the range of L 0 ∈ [20; 80] mm with approximately 150 tested fibres for each length. The equivalent fibre diameter distribution is presented, and the mean and standard deviation are found to be d f = (7.37 ± 0.34) µm. The obtained stress-strain curves are analysed by a second-order polynomial fitting method. The initial modulus, E 0 = (220 ± 3) GPa, and the curvature coefficient α = (3600 ± 250) GPa are determined. The failure stress distribution is analysed by the Weibull model. A Weibull parameter of m ¯ = 6.7 ± 0.8 is determined, and the characteristic ( σ 0 ), median ( σ ˜ ) and mean ( σ ¯ ) failure stresses are found to scale linearly with the gauge length. A length scale independent stress-length factor of σ 0 m ¯ L 0 = ( 560 ± 60 ) GP a m ¯ m is determined. The fibre properties determined in this work can be used as parameters to model the mechanical behaviour of carbon fibre composites by Weibull scaling, as done in [1] and [2].