Influence of FDM process parameters on tensile strength of parts printed by PLA material

Additive manufacturing, particularly the Fused Deposition Modeling (FDM) technique, has garnered considerable interest across multiple industries owing to its capacity to efficiently and inexpensively fabricate intricate geometries. To ensure optimal performance and dependability, it is essential to comprehend the impact of FDM process parameters upon a mechanical properties of 3D-printed parts. The main objective of this work is to investigate the impact of FDM process parameters using Polylactic Acid (PLA) material. The research employs a experimental design utilizing the Box-Behnken approach. Multiple sets of PLA specimens are produced using various FDM process parameters, including air gap, extruder temperature, layer thickness, infill density, and raster angle. Each specimen's tensile strength is measured using a universal testing machine, and result obtained is statistically analyzed for identification of significant correlations between the process parameters and the mechanical performance of the printed parts. The results indicate that specific process parameters in the Fused Deposition Modeling (FDM) technique significantly affect the tensile strength of parts made from Polylactic Acid (PLA). The relationship between layer thickness and infill density and their impact on tensile strength, percent elongation, and maximum force is significant, underscoring the need for careful parameter optimization in the printing process.