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

Abstract

This paper introduces a 3D printing technique of fused filament fabrication (FFF) and the most common materials that works with this technology. The material selected is polylactic acid (PLA) supplied in the local industry by companies dedicated to 3D printing, whose selection is based on the technical information of their products and their availability. The research determines the resistance for PLA. First, the resistance was found by a tensile test of the raw material. The tensile and torsional properties was defined by the control of different parameters such as the temperature, speed, density and infill pattern set by Simplify3D software and CoLiDoX30453D printer. It is studied the influence of infill density in the elements manufactured by 3D printing for values of 40 and 60 %, for flexural specimens is used Full Honeycomb infill pattern, for torsional specimens it is used the Grid infill pattern. The results are validated with Finite Elements software. Finally, this work concludes that the PLA material in supplying state has a tensile strength of 13.6122 MPa, and after manufacturing by 3D printing, it is found that the limit of the flexural strength capacity has a value of 42.5421 and 46.5188 MPa with 40 and 60 % of infill density respectively. In the case of the torsional resistance limit, values of 7,586 and 10,721 MPa were found in the manufactured specimens with 40 and 60 % of infill density.