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Tensile Properties of 3D Printed Polymeric Pieces: Comparison of Several Testing Setups
Propiedades de tracción de piezas poliméricas hechas en impresión 3D: comparación de diversas configuraciones de prueba
DOI:
https://doi.org/10.15446/ing.investig.v41n1.84467Keywords:
3D printing, elastic properties, Tensile tests, testing sensitivity (en)Impresión 3d, propiedades elásticas, ensayos de tracción, sensibilidad de ensayos (es)
This work aims to evaluate and compare variations of a methodology for performing tensile tests on thermoplastic specimens constructed by additive manufacturing technologies (AMT) with filament deposition modeling (FDM). The testing procedures of pieces made in FDM machines do not yet have any conclusive standards because 3D printing, as a disruptive and exponentially growing technology, has not allowed enough time to reach a definitive scientific consensus. Nowadays, testing standards for injected thermoplastic parts or laminated composites are employed as substitutes with careful implementation. A comparative study was carried out on the elasticity modulus, determined within the framework of the same standard but with different measuring devices and testing machines. These machines cover a broad range from professional automated high precision machines to lab and specialized machines. Sets of 3Dprinted specimens with identical manufacturing parameters were constructed in a commercial 3D printer. An analysis of variance was performed in order to evaluate the consistency and significance of experimental data for the same polymer, considering the machine type and its corresponding setup. From the experimental data, it is concluded that, with the due care, all evaluated testing setups can reach comparable results, especially in the absence of sophisticated and expensive measuring systems.
El objetivo de este trabajo es evaluar y comparar variantes en una metodología para realizar ensayos de tracción en probetas termoplásticas hechas con tecnologías de construcción aditiva (AMT) con modelado por deposición de filamento (FDM). Los procedimientos de ensayo para piezas hechas en máquinas FDM aún no tienen estándares conclusivos, pues la impresión 3D, al ser una tecnología disruptiva que crece exponencialmente, no ha dado tiempo suficiente para establecer un consenso científico definitivo. Actualmente, los estándares de prueba para partes con inyección termoplástica se emplean como sustitutos con una implementación cuidadosa. Se efectuó un estudio comparativo del módulo de elasticidad, determinado en el marco del mismo estándar pero con dispositivos de medición y máquinas de prueba diferentes. Estas máquinas cubren un rango que va desde máquinas de ensayo profesionales de alta precisión hasta máquinas de laboratorio construidas adhoc. Se construyeron conjuntos de probetas bajo los mismos parámetros de manufactura en una impresora 3d comercial. Se hizo un análisis de varianza con el fin de evaluar la consistencia y significancia de los datos experimentales para el mismo polímero, teniendo en cuenta el tipo de máquina y su correspondiente configuración. A partir de los datos experimentales, se concluye que, con el debido cuidado, todas las configuraciones de ensayo analizadas pueden alcanzar resultados comparables, especialmente en ausencia de sistemas de medición sofisticados y costosos.
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1. Marcelo Tulio Piovan, Patricio G. Riofrío. (2023). Applied Technologies. Communications in Computer and Information Science. 1756, p.159. https://doi.org/10.1007/978-3-031-24971-6_12.
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Copyright (c) 2021 Andres E Romero, Marcelo T. Piovan, Carlos A. Mainetti, Darío Stechina, Sandra Mendoza, Héctor D. Martín, Norberto C Maggi
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