PAN BASED CARBON FIBER FILAMENT DIAMETER AND THE EFFECT OF DIMENSIONAL LENGTH ON MECHANICAL PROPERTIES

Abstract

In this study, a series of single fiber mechanical tests were performed on carbon fibers of different diameters (5μm, 7μm, 10μm) and gauge lengths (10mm, 25mm and 50mm) to determine their mechanical properties. The results show an increase in both tensile strength and Young's modulus with decreasing fiber diameter. The results also showed an increase in tensile strength with decreasing measurement length. Weibull distribution analysis provided further insight into the effect of measure length. It was observed that as the measurement length increased, the possibility of avoiding inherent errors in the fiber decreased.