Abstract
Additive manufacturing is rapidly expanding across various industrial sectors, due to its design flexibility and material efficiency.Among AM techniques, fused deposition modelling remains the most widespread for fabricating polymer components.The mechanical performance of printed parts largely depends on process parameters, particularly infill density.In this study, a novel approach is employed, by filling FDM-printed polylactic acid specimens, with epoxy resin to enhance the mechanical properties.Gyroid infill topology was selected, owing to its continuous and interconnected geometry, which allows complete resin penetration.Experimental investigations were conducted on specimens with 25%, 50%, and 100% infill densities, using two types of epoxy resin.Tensile, flexural, and compression tests were performed to evaluate the influence of resin infiltration.The results revealed that resin type significantly affects the mechanical responses.While solid PLA samples exhibited the highest tensile and compressive strengths, the epoxy-infilled composites demonstrated improved flexural performance and reduced printing time, indicating the potential of this approach for lightweight, time-efficient, manufacturing applications.