Fabrication of triangular corrugated structure using 3D printed continuous carbon fiber-reinforced thermosetting epoxy composites

A novel 3D printing methodology using continuous carbon fiber (CCF) reinforced thermosetting epoxy (EP) composites was proposed to fabricate triangular corrugated structures (TCSs). The single-stroke path ensured a strong connection between the core and face sheets. Silicone rubber deposited vulcanized solve shape retention problem of preformed sample during post-curing. Flatwise compression tests were conducted evolution stress-strain curves upon deformation discussed as well. Particular attention paid influence typical parameters, including vacuum pressure cell length, on compressive properties printed composites. Compared with unreinforced nylon (PA), short fiber-reinforced PA, PA samples, significant increase in strength, stiffness, energy absorption abilities observed for CCF/EP TCS sample. Finally, hexagonal grid structures, well basic mechanical pure resin composites, demonstrated prove process capability fabrication high-performance samples complex geometries. In this respect, method offers mold-free out-of-autoclave approach which is beneficial their future applications lightweight structure industry.