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 L0∈ [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 df=(7.37 ± 0.34) µm. The obtained stress-strain curves are analysed by a second-order polynomial fitting method. The initial modulus, E0= (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 (σ0), median (σ˜) and mean (σ¯) failure stresses are found to scale linearly with the gauge length. A length scale independent stress-length factor of σ0m¯L0=(560±60)GPam¯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].