Numerical Modeling of the Material Deposition and Contouring Precision in Fused Deposition Modeling

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Abstract

We present a numerical model of the material deposition in fused deposition modeling. The flow of the material extruded from the printing head nozzle is simulated within the computation fluid dynamics (CFD) paradigm. The molten thermo plastic is modeled as an incompressible Newtonian fluid with a free surface. The numerical model provides a prediction of the shape of the printed road. Four deposition strategies are investigated to print a road along a tool path with a 90° turn. The investigated scenarios include the ideal case of an extrusion rate synchronized with the printing speed, as well as the cases of a sharp tool path with a stop-at-turn trajectory, and as moothed tool path with blended acceleration. The CFD simulation provides a way to optimize the tool path planning and the deposition strategy, in order to improve dimensional accuracy in extrusion-based additive manufacturing.
Original languageEnglish
Title of host publicationProceedings of the Annual International Solid Freeform Fabrication Symposium
PublisherLaboratory for Freeform Fabrication
Publication date2018
Pages1855-1864
Publication statusPublished - 2018
Event29th Annual International Solid Freeform Fabrication Symposium (SFF Symp 2018) - Austin, United States
Duration: 13 Aug 201815 Aug 2018

Conference

Conference29th Annual International Solid Freeform Fabrication Symposium (SFF Symp 2018)
CountryUnited States
CityAustin
Period13/08/201815/08/2018

Cite this

Comminal, R., Serdeczny, M. P., Pedersen, D. B., & Spangenberg, J. (2018). Numerical Modeling of the Material Deposition and Contouring Precision in Fused Deposition Modeling. In Proceedings of the Annual International Solid Freeform Fabrication Symposium (pp. 1855-1864). Laboratory for Freeform Fabrication.