Impact and Shear behavior of PLA/12%Cu reinforced composite filament printed at different FDM conditions

The advantages of metal powder in the Polylactic Acid (PLA) matrix for strengthening have attracted interest among the
researchers. An attempt was made to use the advantages of copper (Cu) as the reinforcing component in the PLA matrix.
After a few series of exams, copper with weight percentages of 12 in the PLA matrix was reported to be an appropriate
composition. The PLA-Cu composite flament with 12% Cu was successfully manufactured using hot extrusion. 1.75–mmdiameter extracted composite flament was built according to the ASTM standard for shear and impact testing under various
Fused Deposition Model (FDM) conditions. The efects of nozzle temperature, bed temperature, and layer height on diferent printing conditions were examined. The efect of the FDM parameters during impact load conditions was in the order of
the nozzle temperature, bed temperature, and layer height. The efect of FDM machining conditions on the shear depends
primarily on the thickness of the layer. The shear test is minimally infuenced by the extrusion temperature. Analysis of the topography of the fracture surface reveals that a fracture surface is a form of plastic deformation and that the crack initiated from the layer limit. The dislocations of the Cu particles through the slide advances toward the failure. An elevated extrusion temperature reduces ductility. Diferent surface profle settings are analyzed using 3D optical microscopy.