Influence of fiber volume ratio on hybrid effects of pultruded aramid/carbon hybrid fiber reinforced polymer composite bars: Static mechanical properties

To improve the mechanical performance of hybrid composites, this study fabricated aramid-carbon fiber-reinforced polymer (A/CHFRP) bars through the pultrusion process, utilizing aramid fibers as the outer layer and carbon fibers as the inner core. The effect of the volume ratio of aramid to carbon fibers on the hybrid effect of the static mechanical properties of the A/CHFRP was studied using tensile, bending, and shear tests. The study revealed that increasing the carbon fiber content enhanced the tensile strength and modulus of A/CHFRP; however, the material did not exhibit "pseudo-ductility." The flexural stress-strain curve of A/CHFRP displayed a linear pattern akin to that of CFRP. While higher carbon fiber content improved the flexural strength and modulus, it resulted in a reduction in shear performance. This study presents a design method for A/CHFRP, and the resulting material can be used in bridge cables to offer improved impact resistance.