Análise de resistência mecânica de elementos roscados fabricados em PLA pelo processo de impressão 3D considerando diferentes tipos de preenchimentos

Abstract

Additive manufacturing, or 3D printing, has established itself as one of the most promising technologies for component production across various industries, such as automotive, biomedical, and aerospace. This technique enables the creation of complex geometries, cost reduction, and customization of parts with speed and precision. Among the most commonly used materials, polylactic acid (PLA) stands out as a biodegradable, affordable, and easily processed polymer, widely employed in prototyping and functional component manufacturing. However, the mechanical strength of PLA-printed parts is strongly influenced by factors such as the type and density of internal infill. This is particularly relevant for threaded elements, extensively used in mechanical assemblies for fixation and connection. Analyzing how different infill patterns affect the mechanical strength of these elements is essential to ensure the safety and structural integrity of projects utilizing 3D printing. This study aims to evaluate the mechanical strength of threaded elements manufactured in PLA using 3D printing, considering different infill patterns and densities. Prototypes will be developed, and experimental tests will be conducted, including tensile, compression, and torque tests, to investigate the influence of these variables on the mechanical behavior of the elements. The results will address gaps in the scientific literature, contributing to the efficient use of PLA in engineering projects and providing practical recommendations for industry applications.