Investigation on the mechanical properties of 3D printed hybrid continuous fiber-filled composite considering influence of interfaces

Fused deposition modeling (FDM) is a promising additive manufacturing technique for fabrication of continuous fiber-reinforced thermoplastic composites. For composite applications, the balance material properties, including rigidity and toughness, needs to be considered. To overcome drawbacks induced by single fiber reinforcement, this study focused on design characterization hybrid (continuous carbon Kevlar fibers)-reinforced polyamide (PA)-based composites, prepared 3D printing, achieve comprehensive performance improvements designable mechanical properties. The deformation failure behaviors with effects conception, stacking sequences, raster orientations composites were investigated. A effect model was introduced evaluate printed fiber-filled Besides, compared fabricated via conventional methods, major difference in interfacial bonding. roller peeling test therefore conducted investigate strength different materials. An analytical approach developed predict tensile modulus introducing an strengthening coefficient into volume average stiffness model. combined experimental predicted results showed that specimens separated distribution sequence higher concentrated distribution. properties layers attributed strong bonding, which delayed crack initiation propagation.