2020
DOI: 10.1016/j.addma.2020.101239
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Bead parameterization of desktop and room-scale material extrusion additive manufacturing: How print speed and thermal properties affect heat transfer

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Cited by 27 publications
(21 citation statements)
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“…Typically, the welding quality relies on polymer diffusion across the interface to form bridging entanglements, which depends on the geometry of adjacent printed roads [ 50 , 51 ] and the build (layer) orientation [ 52 ]. The overall print layout can affect the local thermal history, which determines the effective diffusion time [ 53 ]. Thus, printing multiple parts simultaneously can lead to changes in the mechanical properties as increased cooling between printed layers (interlayer time) leads to less effective polymer diffusion across interlayer to deteriorate mechanical properties [ 54 ].…”
Section: Introductionmentioning
confidence: 99%
“…Typically, the welding quality relies on polymer diffusion across the interface to form bridging entanglements, which depends on the geometry of adjacent printed roads [ 50 , 51 ] and the build (layer) orientation [ 52 ]. The overall print layout can affect the local thermal history, which determines the effective diffusion time [ 53 ]. Thus, printing multiple parts simultaneously can lead to changes in the mechanical properties as increased cooling between printed layers (interlayer time) leads to less effective polymer diffusion across interlayer to deteriorate mechanical properties [ 54 ].…”
Section: Introductionmentioning
confidence: 99%
“…Zhou et al [ 12 ] optimized FFF processing parameters to reduce the warpage of printed ABS parts through a voxel-based finite element simulation and showed that the print chamber temperature has a significant effect on thermal deformation. D’Amico and Peterson presented an adaptive finite element method to evaluate heat transfer in polymer deposition additive manufacturing [ 13 , 14 ]. They found that large volume deposition processes retain more heat than desktop size printers which improved the interlayer diffusion, but promoted slumping or sagging.…”
Section: Introductionmentioning
confidence: 99%
“…These results indicate that the effect of print speed can be well accounted for from layer time. Layer time was first presented as important within large scale material extrusion (big area additive manufacturing, or BAAM) 30 , 36 , 37 and has also been acknowledged as important to the desktop scale material extrusion represented by FFF 2 , 38 , 39 . Since increasing layer time leads to lower tear energy in this system, efforts should be made when planning an ABS print to shorten the layer time when practical.…”
Section: Resultsmentioning
confidence: 99%
“…Structures fabricated using FFF are commonly used industrially for functional prototyping and tooling, with broader adoption often limited by inferior mechanical properties. In FFF in particular 2 , molten polymer rapidly cools below the glass transition temperature (T g ) after extrusion 3 leading to poor interlayer adhesion as well as warping.…”
Section: Introductionmentioning
confidence: 99%