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

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- Investigación (EPEF) [581]
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Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition ModelingAutor(es)
Data
2020Cita bibliográfica
Gosset, A.; Barreiro-Villaverde, D.; Becerra Permuy, J.C.; Lema, M.; Ares-Pernas, A.; Abad López, M.J. Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling. Polymers 2020, 12, 2885. https://doi.org/10.3390/polym12122885
Resumo
[Abstract] 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
Palabras chave
Termoplásticos
Dinámica de los fluidos computacional
Dinámica de fluidos
Thermoplastic
High-speed visualization
Computational fluid dynamics
Single strand deposition
High printing speeds
Dinámica de los fluidos computacional
Dinámica de fluidos
Thermoplastic
High-speed visualization
Computational fluid dynamics
Single strand deposition
High printing speeds
Versión do editor
Dereitos
Atribución 4.0 Internacional
ISSN
2073-4360