Measurements and simulations of the cross-section of the printed strands in fused filament fabrication

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Abstract

We measure and simulate the shape of an extruded strand in Fused Filament Fabrication; an additive manufacturing method where a solid thermoplastic material is melted and extruded through a nozzle in order to create a layered three-dimensional object. The prediction of the strand shape is essential in order to estimate the porosity, the surface roughness, and the dimensional accuracy of the fabricated parts. Using optical microscopy, we quantify the dimensions of the strand cross-sections, for different printing conditions. For the first time, we compare experimental measurements of the strand cross-section with numerical results of three-dimensional computational fluid dynamics simulations. The numerical model predicts the effect of change of the layer height on the strand morphology and shows good agreements with the measurements.
Original languageEnglish
Title of host publicationProceedings - 2018 ASPE and euspen Summer Topical Meeting: Advancing Precision in Additive Manufacturing
PublisherAmerican Society for Precision Engineering
Publication date2018
Pages78-82
ISBN (Electronic)978-188770676-6
Publication statusPublished - 2018
Event2018 ASPE and euspen Summer Topical Meeting: Advancing Precision in Additive Manufacturing - Lawrence Berkeley National Laboratory, Berkeley, United States
Duration: 22 Jul 201825 Jul 2018

Conference

Conference2018 ASPE and euspen Summer Topical Meeting
LocationLawrence Berkeley National Laboratory
CountryUnited States
CityBerkeley
Period22/07/201825/07/2018
OtherJoint Special Interest Group meeting: Additive Manufacturing

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