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Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling

In the last decade, Fused Deposition Modeling (FDM) has gained popularity for allowing the fabrication of pieces with complex shapes. The final quality of the pieces is strongly linked to the shape, size and surface finish of the strands deposited successively, which themselves depend on the printin...

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Autores principales: Gosset, Anne, Barreiro-Villaverde, David, Becerra Permuy, Juan Carlos, Lema, Marcos, Ares-Pernas, Ana, Abad López, María José
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760891/
https://www.ncbi.nlm.nih.gov/pubmed/33271895
http://dx.doi.org/10.3390/polym12122885
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author Gosset, Anne
Barreiro-Villaverde, David
Becerra Permuy, Juan Carlos
Lema, Marcos
Ares-Pernas, Ana
Abad López, María José
author_facet Gosset, Anne
Barreiro-Villaverde, David
Becerra Permuy, Juan Carlos
Lema, Marcos
Ares-Pernas, Ana
Abad López, María José
author_sort Gosset, Anne
collection PubMed
description In the last decade, Fused Deposition Modeling (FDM) has gained popularity for allowing the fabrication of pieces with complex shapes. The final quality of the pieces is strongly linked to the shape, size and surface finish of the strands deposited successively, which themselves depend on the printing parameters and extruded material properties. In this work, we present an experimental characterization of an extruded and deposited single strand of Poly-Lactic Acid (PLA), by means of high-speed visualization of the bead region between the substrate and the nozzle, where the molten polymer is still in liquid phase. A Computational Fluid Dynamics (CFD) model proposed in literature, and, based on isothermal and viscous flow assumptions, is validated with this data in terms of strand height and meniscus shape. The characteristics of the printed layer are also confronted to the measurements of the solidified strands by microscopy, with a good agreement. The focus on high printing speeds allows extending the conclusions of previous studies. Regarding the surface finish, the roughness patterns detected on the printed strands are correlated to the velocity fluctuations of the printing head. The CFD model does not capture those thickness variations, however, due to not accounting for solidification.
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spelling pubmed-77608912020-12-26 Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling Gosset, Anne Barreiro-Villaverde, David Becerra Permuy, Juan Carlos Lema, Marcos Ares-Pernas, Ana Abad López, María José Polymers (Basel) Article In the last decade, Fused Deposition Modeling (FDM) has gained popularity for allowing the fabrication of pieces with complex shapes. The final quality of the pieces is strongly linked to the shape, size and surface finish of the strands deposited successively, which themselves depend on the printing parameters and extruded material properties. In this work, we present an experimental characterization of an extruded and deposited single strand of Poly-Lactic Acid (PLA), by means of high-speed visualization of the bead region between the substrate and the nozzle, where the molten polymer is still in liquid phase. A Computational Fluid Dynamics (CFD) model proposed in literature, and, based on isothermal and viscous flow assumptions, is validated with this data in terms of strand height and meniscus shape. The characteristics of the printed layer are also confronted to the measurements of the solidified strands by microscopy, with a good agreement. The focus on high printing speeds allows extending the conclusions of previous studies. Regarding the surface finish, the roughness patterns detected on the printed strands are correlated to the velocity fluctuations of the printing head. The CFD model does not capture those thickness variations, however, due to not accounting for solidification. MDPI 2020-12-01 /pmc/articles/PMC7760891/ /pubmed/33271895 http://dx.doi.org/10.3390/polym12122885 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gosset, Anne
Barreiro-Villaverde, David
Becerra Permuy, Juan Carlos
Lema, Marcos
Ares-Pernas, Ana
Abad López, María José
Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title_full Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title_fullStr Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title_full_unstemmed Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title_short Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling
title_sort experimental and numerical investigation of the extrusion and deposition process of a poly(lactic acid) strand with fused deposition modeling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760891/
https://www.ncbi.nlm.nih.gov/pubmed/33271895
http://dx.doi.org/10.3390/polym12122885
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