Optimization of 3D Printing Parameters by FDM in PLA to Maximize Flexural Strength
DOI:
https://doi.org/10.15665/rp.v24i1.3836Keywords:
Additive Manufacturing Optimization, Flexural Strength of 3D Printed PLA, 3D Printing Process ParametersAbstract
Additive manufacturing through fused deposition modeling (FDM) has become a viable alternative for producing functional polymer components. This study evaluates the influence of three printing parameters—nozzle diameter, number of perimeters, and infill density—on the flexural strength of polylactic acid (PLA) specimens. A full 2³ factorial design with a central point was implemented, generating 45 specimens printed under controlled conditions and tested according to ASTM D790-10. Results show that flexural strength values exceeded the manufacturer’s reported value (55.16 MPa), reaching a maximum of 127.91 MPa with a 1.2 mm nozzle, 10 perimeters, and 50% infill density. Statistical analysis revealed that nozzle diameter and number of perimeters had significant positive effects, while infill density showed a minor contribution. It is concluded that optimizing extrusion and geometric parameters can substantially enhance the structural performance of PLA parts manufactured by FDM, providing guidelines for applications where mechanical strength is critical.
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