Effect of Filament Storage Conditions on the Mechanical Properties of 3D Printed Objects Prepared with Fused Filament Fabrication

Lendvai, László and Fekete, Imre (2021) Effect of Filament Storage Conditions on the Mechanical Properties of 3D Printed Objects Prepared with Fused Filament Fabrication. In: 12th IEEE International Conference on Cognitive Infocommunications (CogInfoCom 2021). IEEE, Online kiadás, pp. 707-710. ISBN 9781665424950; 9781665424943

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Abstract

In this current study, the relations between the mechanical properties of 3D printed objects and the humidity of the build material during the 3D printing process have been investigated. For this purpose specimens were prepared from poly(lactic acid) (PLA) using the fused filament fabrication technique. The PLA filament used as building material was stored in a humidification chamber before and during the 3D printing process. The relative humidity (RH) in the chamber was varied in the range of 10-90%. A total of five sets of specimens were prepared at 10%, 30%, 50%, 70% and 90% RH. Mechanical properties of the fabricated samples were determined by means of tensile tests and Charpy impact tests. According to the results, the specimens printed from the filaments stored at 10% RH exhibited the highest tensile strength (~55 MPa), Young’s modulus (~2.7 GPa), elongation at break (~2.6%) and impact strength (~17.6 kJ/m2 ) values. The higher RH values generally resulted in lower mechanical properties, bottoming at 90% RH, at which point all the properties suffered a relative loss of 10-15% compared to the samples prepared at 10% RH.

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