Análise de propriedades mecânicas de corpos de prova de PLA e PLA com fibra de carbono fabricado com manufatura aditiva com variação de densidade de impressão

Abstract

This undergraduate thesis aims to investigate the mechanical properties of PLA (polylactic acid) specimens with the addition of 20% carbon fiber and pure PLA, manufactured through additive prototyping. Two specimens were produced for each material, one with 20% infill and another with 70% infill. The ASTM D790 standard, titled "Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials," served as the basis for conducting the flexural tests. This standard describes the procedures for determining the flexural strength and flexural modulus of plastic materials. The specimens were subjected to the tests, and the results were analyzed to evaluate the mechanical performance of the materials. The obtained results showed that the addition of 20% carbon fiber to PLA significantly improved its mechanical properties compared to pure PLA. The specimens with 20% carbon fiber exhibited higher flexural strength and stiffness compared to pure PLA specimens. Furthermore, the specimens with 70% infill showed even better performance in terms of flexural strength.