Determinación del límite de resistencia a la tracción y compresión del material ácido poliláctico manufacturado mediante impresión 3D

Abstract

The present technical project is focused on the characterization of polylactic acid material (PLA) from destructive tests, such as tensile and compression. Which, they were made in the universal machine TESTRESOURCES Series 315, according to the standards ASTM D638 and ASTM D695. The research starts from the study of the current situation of the additive manufacturing process present in the Ecuadorian market, where there is the absence of companies specialized in the development of components manufactured using 3D printing for the industrial market. The second point is the responsibility of the PLA filament compartment submitted to the tensile test controlled by ASTM D2256, in order to obtain its mechanical properties in the delivery state. As a third point, reference is made to the manufacturing process through Fused Deposition Modeling (FDM) and to the printing parameters such as extrusion temperature, bed temperature, printing speed, layer thickness, pattern and filling density. The fourth point covers the theoretical analysis of tensile and compression tests with the help of the ANSYS R19.0 Academic software. Finally, because of the experimental analysis, the limit of the tensile strength capacity is 8.19 and 13.89 MPa for 40 and 60% fill density. On the other hand, the limit of compressive strength is 8.24 and 9.42 MPa, for densities of 40 and 60%, respectively, validated through the theoretical - experimental comparison.