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Desktop Fabrication of Strong Poly (Lactic Acid) Parts: FFF Process Parameters Tuning

1
Department of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology “MISIS”, Leninskiy Prospekt 4, NUST MISIS, 119049 Moscow, Russia
2
Departament of Automated Control Systems, National University of Science and Technology “MISIS”, Leninskiy Prospekt 4, NUST MISIS, 119049 Moscow, Russia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(13), 2071; https://doi.org/10.3390/ma12132071
Received: 10 June 2019 / Revised: 24 June 2019 / Accepted: 25 June 2019 / Published: 27 June 2019
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Abstract

The current study aims to evaluate the possibilities to increase part strength by optimizing the Fused Filament Fabrication (FFF) process parameters. Five different CAD models of parts with the same coupling dimensions but of different shape inherited from a recent study were converted into test samples with Ultimaker 2 3D printer. The main measure of success was the sample strength, defined as the load at which the first crack in the stressed area of the part appeared. Three different modifications to the FFF process with verified positive effect on interlayer bonding were applied. The first modification included raising the extrusion temperature and disabling printed part cooling. The second modification consisted of reduction in the layer thickness. The third modification combined the effects of the first and the second ones. For four out of five shapes tested the applied process modifications resulted in significant strengthening of the part. The shape that exhibited the best results was subject to further research by creating special printing mode. The mode included fine-tuning of three technological parameters on different stages of the part fabrication. As a result it was possible to increase the part strength by 108% only by tuning printing parameters of the best shape designed with increasing its weight by 8%. View Full-Text
Keywords: fused filament fabrication; fused deposition modeling; interlayer bonding; technology optimization fused filament fabrication; fused deposition modeling; interlayer bonding; technology optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kuznetsov, V.E.; Tavitov, A.G.; Urzhumtsev, O.D.; Korotkov, A.A.; Solodov, S.V.; Solonin, A.N. Desktop Fabrication of Strong Poly (Lactic Acid) Parts: FFF Process Parameters Tuning. Materials 2019, 12, 2071.

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