Process-Induced Fiber Orientation in Fused Filament Fabrication
As the applications for additive manufacturing have continued to grow, so too has the range of available materials, with more functional or better performing materials constantly under development. This work characterizes a copper-filled polyamide 6 (PA6) thermoplastic composite designed to enhance...
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doaj-eee1ec67ff7242248ebcc102ce7a27772020-11-24T21:40:04ZengMDPI AGJournal of Composites Science2504-477X2018-08-01234510.3390/jcs2030045jcs2030045Process-Induced Fiber Orientation in Fused Filament FabricationTom Mulholland0Sebastian Goris1Jake Boxleitner2Tim A. Osswald3Natalie Rudolph4Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USADepartment of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USADepartment of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USADepartment of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USAAREVO, Inc., Santa Clara, CA 95054, USAAs the applications for additive manufacturing have continued to grow, so too has the range of available materials, with more functional or better performing materials constantly under development. This work characterizes a copper-filled polyamide 6 (PA6) thermoplastic composite designed to enhance the thermal conductivity of fused filament fabrication (FFF) parts, especially for heat transfer applications. The composite was mixed and extruded into filament using twin screw extrusion. Because the fiber orientation within the material governs the thermal conductivity of the material, the orientation was measured in the filament, through the nozzle, and in printed parts using micro-computed tomography. The thermal conductivity of the material was measured and achieved 4.95, 2.38, and 0.75 W/(m·K) at 70 °C in the inflow, crossflow, and thickness directions, respectively. The implications of this anisotropy are discussed using the example of an air-to-water crossflow heat exchanger. The lower conductivity in the crossflow direction reduces thermal performance due to the orientation in thin-walled parts.http://www.mdpi.com/2504-477X/2/3/45thermal conductivityfiber orientationcompositefillerheat exchangercopper |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tom Mulholland Sebastian Goris Jake Boxleitner Tim A. Osswald Natalie Rudolph |
spellingShingle |
Tom Mulholland Sebastian Goris Jake Boxleitner Tim A. Osswald Natalie Rudolph Process-Induced Fiber Orientation in Fused Filament Fabrication Journal of Composites Science thermal conductivity fiber orientation composite filler heat exchanger copper |
author_facet |
Tom Mulholland Sebastian Goris Jake Boxleitner Tim A. Osswald Natalie Rudolph |
author_sort |
Tom Mulholland |
title |
Process-Induced Fiber Orientation in Fused Filament Fabrication |
title_short |
Process-Induced Fiber Orientation in Fused Filament Fabrication |
title_full |
Process-Induced Fiber Orientation in Fused Filament Fabrication |
title_fullStr |
Process-Induced Fiber Orientation in Fused Filament Fabrication |
title_full_unstemmed |
Process-Induced Fiber Orientation in Fused Filament Fabrication |
title_sort |
process-induced fiber orientation in fused filament fabrication |
publisher |
MDPI AG |
series |
Journal of Composites Science |
issn |
2504-477X |
publishDate |
2018-08-01 |
description |
As the applications for additive manufacturing have continued to grow, so too has the range of available materials, with more functional or better performing materials constantly under development. This work characterizes a copper-filled polyamide 6 (PA6) thermoplastic composite designed to enhance the thermal conductivity of fused filament fabrication (FFF) parts, especially for heat transfer applications. The composite was mixed and extruded into filament using twin screw extrusion. Because the fiber orientation within the material governs the thermal conductivity of the material, the orientation was measured in the filament, through the nozzle, and in printed parts using micro-computed tomography. The thermal conductivity of the material was measured and achieved 4.95, 2.38, and 0.75 W/(m·K) at 70 °C in the inflow, crossflow, and thickness directions, respectively. The implications of this anisotropy are discussed using the example of an air-to-water crossflow heat exchanger. The lower conductivity in the crossflow direction reduces thermal performance due to the orientation in thin-walled parts. |
topic |
thermal conductivity fiber orientation composite filler heat exchanger copper |
url |
http://www.mdpi.com/2504-477X/2/3/45 |
work_keys_str_mv |
AT tommulholland processinducedfiberorientationinfusedfilamentfabrication AT sebastiangoris processinducedfiberorientationinfusedfilamentfabrication AT jakeboxleitner processinducedfiberorientationinfusedfilamentfabrication AT timaosswald processinducedfiberorientationinfusedfilamentfabrication AT natalierudolph processinducedfiberorientationinfusedfilamentfabrication |
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