Effect of the number of filaments on the tensile properties of polyacrylonitrile- and pitch-based carbon fiber epoxy-impregnated bundle composites

• Published in: Results in materials Vol. 19; p. 100424
• Main Author: Naito, Kimiyoshi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2023; Elsevier
• Subjects: Composites; Fibres; Mechanical properties; Fibres; Mechanical properties; Composites
• ISSN: 2590-048X; 2590-048X
• DOI: 10.1016/j.rinma.2023.100424

This study investigated the effect of the number of filaments on the tensile properties of high tensile strength polyacrylonitrile-based (T1000GB) and high modulus pitch-based (K13D) carbon fiber epoxy-impregnated bundle composites. In addition, the Weibull statistical distributions of the tensile strength were evaluated. The results clearly demonstrate that the tensile strength of the bundle composites increased with the increasing number of filaments in the case of a smaller number of filaments, ultimately reaching a maximum value. In contrast, for a larger number of filaments, the tensile strength decreased with the increasing number of filaments. In addition, for a smaller number of filaments, the Weibull modulus of the bundle composites increased with an increase in the number of filaments, whereas it remained constant in the case of a larger number of filaments. [Display omitted] •Tensile strength and Weibull modulus increased with the increasing smaller number of filaments.•Weibull modulus remained constant in the case of a larger number of filaments.•Weibull modulus–number of filaments relations can be represented by logistical equations.