Effects of Nozzle Temperature on Mechanical Properties of Polylactic Acid Specimens Fabricated by Fused Deposition Modeling.

This paper investigates the effect of nozzle temperature, from 180 to 260 °C, on properties of polylactic acid (PLA) samples manufactured by fused deposition modeling (FDM) technology. The main objective of this research is to determinate an optimum nozzle temperature relative to tensile, flexural and compressive properties of printed specimens. After manufacturing, the samples exhibit an amorphous structure, without crystallization effects, independently of the fabrication temperature.

Effect of Process Parameters and Postprocessing on Mechanical Properties of Additive Manufacturing Polylactic Acid Obtained by Fused Deposition Modeling.

The aim of this article is to study the influence of some printing parameters and postprocessing on mechanical properties of polylactic acid samples manufactured by fused deposition modeling with a 3D printer. The effects of different building orientations, concentric infill, and postprocessing by annealing were analyzed. In this sense, uniaxial tensile and three-point bending tests were performed to determine the ultimate strength, modulus of elasticity, and elongation at break.