Optimization of mechanical properties in 3D-printed PLA parts with honeycomb and cubic infill patterns using taguchi method

Abstract. 3D printing is a revolutionary manufacturing technology that provides previously unheard-of levels of efficiency and design freedom. Fused Deposition Modeling (FDM) is a popular method for creating complicated parts using thermoplastic materials like Polylactic Acid (PLA). Layer height, layup speed, and infill pattern are some of the process variables that have a major impact on the mechanical characteristics of PLA components that are FDM produced. The goal of this study was to maximize the mechanical performance of PLA components made with honeycomb and cubic infill patterns. The best combinations of layer height, layup speed, and infill density were found via Taguchi optimization. The findings showed that in terms of modulus and tensile strength, honeycomb infill designs continuously performed better than cubic patterns. Notably, a 40% infill density with a 0.3 mm layer height and a 60 mm/s layup speed yielded the best mechanical properties for honeycomb-patterned parts. The Taguchi study emphasized how important layer height and infill density are to mechanical performance. These results offer useful recommendations for producers looking to enhance FDM procedures in order to create long-lasting, premium PLA components. Tensile strength and modulus were found to be most significantly impacted by infill density and layer height when the Taguchi method was used to optimize the process parameters.