Caracterización de materiales termoplásticos de ABS y PLA semi - rígido impresos en 3D con cinco mallados internos diferentes

Abstract

This work studies the mechanical properties of Acrylonitrile Butadiene Styrene (ABS) and polylactic acid (PLA) of the samples obtained by additive manufacturing technique with 3D printing by the deposition process of molten material; the mechanical behavior investigated materials being formed by an internal mesh occupying 1/3 the thickness of the specimen, consisting of geometric figures, such as triangle, square, pentagon, concentric circles, and finally the material distributed diagonally in one direction. All samples obtained were characterized by standard tensile and flexural tests; the material deposition was performed at 45 ° tilt. The maximum stress obtained in the solid material of PLA was 57 [MPa] and the ABS 35 [Mpa], the semi-rigid material with the closest resistance was the PLA diagonal mesh with 46.6 [Mpa]; while the ABS square mesh obtained 30.7 [MPa]. Besides, an electron microscopy analysis was performed to analyze the adhesion between layers of printed material in the fracture zones. Also, comparative tables were develop, between the different configurations for PLA and ABS, representing the mechanical properties: tensile strength, modulus of elasticity, flexural strength, and 3D printing weight and time. Finally, it was observed that meshed specimens have advantages over one another depending on the mechanical property and specific application.