Análise da influência dos parâmetros de impressão 3d na resistência a tração de corpos de provas produzidos em PLA

Abstract

Additive manufacturing (AM) emerges as a great alternative to traditional manufacturing processes, as it opens up possibilities for manufacturing complex parts with lower costs and time, gaining prominence in the engineering and design sector of companies, allowing the production of projects with lower costs. Within AM, the main method used is the melting and deposition of material (FDM), being low cost, easy to use and a huge range of applications. In view of this, there is a great need for the study of printing parameters and their projections in the final result of the part. The general objective of this work is to analyze the influence of the parameters: layer height, filling level and type of filling on the tensile strength of specimens (PCs) produced in Poly Lactic Acid (PLA). Based on the ASTM D638-14a standard, the CP geometry and standard testing processes are defined. The work continued with the carrying out of the tests and then from the data obtained, the influence of the variation of the parameters of layer height, filling level and type of filling was analyzed, which affected the tensile strength, elongation, printing time and mass. applied to the PLA filament. Data analysis was performed using the Minitab software, using the Analysis of variance (ANOVA) tool, where it is possible to determine which parameters have a significant influence within what was proposed. As a result, layer height had a significant influence on elongation and printing time, filling level significantly influenced LTR, elongation and mass, however depression time was influenced, but not at the ANOVA significance level, finally, the type of filling did not significantly affect any of the considered points.