STUDY ON THE MECHANICAL BEHAVIORS OF 3D PRINTED HYBRID COMPOSITES WITH VARIOUS COMBINATION PATTERNS BETWEEN CARBON FIBER AND GLASS FIBER

Abstract

Carbon fiber reinforced polymer (CFRP) composites have been applied into many applications due to high specific strength and modulus. However, CFRP composites have very low failure strain, along with unexpected fracture, which is a disadvantage in engineering design. In this study, mechanical behavior of hybrid composites with various carbon fiber/glass fiber patterns were investigated to implement the composites that compensates for disadvantages of each material. Traditionally, while it is difficult to manufacture hybrid composite in intralayer level, 3D printing technology could make various complicated hybrid patterns by micro scale. Hybrid composites specimens were fabricated by intrayarn level using 3D printing. Tensile test and three-point-bending test were performed to investigate the mechanical behavior of HFRP composites. Consequently, hybrid composites with higher dispersion showed improved tensile strength and modulus. Flexural strength and modulus could be increased by 71.3, 84.8, and 56% in hybrid composite than glass fiber reinforced polymer (GFRP) composites.