Analysis of the Mechanical Characteristics and Properties of a Carbon Fiber–Nylon Composite Influence of the Factors of the Fused Deposition Modeling

Experiments using carbon fiber reinforcing nylon composite produced by fused deposition modeling were conducted to determine mechanical parameters such as impact strength, tensile strength, and flexural strength. Four parameters—layer thickness, printing speed, raster angle, infill density, and twenty-seven runs—were used in the Box–Behnken technique of experimental design. Carbon fiber–nylon composite materials have flexural strengths that range from 20.12 to 25.89 N/mm², tensile strengths that range from 22.75 to 34.35 N/mm², and impact strengths that range from 0.37 to 0.72 kJ/m². Tensile strength was significantly affected by printing speed, while impact and flexural strength was mainly influenced by layer thickness and raster angle. A scanning electron microscope was used on the broken sample to investigate the failure mechanism. Cavities, hillocks, smearing, fracture, ridges, pores, clusters, particle pullout, delamination, deep hole, protrusion, void, crack, infill gap, and interface all have an impact on composite fracture mechanisms.