Aufsatz
Numerical simulation of flow processes of wood‐polymer in extrusion dies
Zusammenfassung
The addition of wood to polymers results in wood‐polymer composites (WPC), whereby the wood content can be up to 80 %. This composite is mainly processed in extruded deckings. The extrusion die is an essential part of the process, which determines both process parameters and the final product. A characteristic of WPC extrusion dies is a partial solidification of the melt before leaving the die. This solidification is necessary to ensure a dimensionally stable extrusion. For the design of WPC extrusion dies numerical flow field calculations are increasingly used. Based on rheological measurements, both the shear thinning flow behaviour and the temperature dependence of the viscosity are modelled. In the parallel zone a pure shear flow is present, while in the transition elements such as the flange to the extruder or the mandrel due to the cross‐sectional changes strain rates are dominant. High‐density polyethylene (HDPE) with wood fibers has shear thinning and strain thickening behavior, so different models are needed to describe it. The results of the numerical simulations are compared with experimental values of an extrusion die for a square hollow profile.
Zitierform
In: Proceedings in applied mathematics and mechanics (PAMM) Volume 20 / Issue 1 (2021-01-25) EISSN 1617-7061Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202101283075,
author={Liese, Fabian and Wünsch, Olaf},
title={Numerical simulation of flow processes of wood‐polymer in extrusion dies},
journal={Proceedings in applied mathematics and mechanics (PAMM)},
year={2021}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2021$n2021 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/12487 3000 Liese, Fabian 3010 Wünsch, Olaf 4000 Numerical simulation of flow processes of wood‐polymer in extrusion dies / Liese, Fabian 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/12487=x R 4204 \$dAufsatz 4170 5550 {{Wood-Plastic-Composite}} 5550 {{Extruderwerkzeug}} 5550 {{Verbundwerkstoff}} 5550 {{Simulation}} 7136 ##0##http://hdl.handle.net/123456789/12487
2021-02-10T12:33:46Z 2021-02-10T12:33:46Z 2021-01-25 doi:10.17170/kobra-202101283075 http://hdl.handle.net/123456789/12487 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 600 Numerical simulation of flow processes of wood‐polymer in extrusion dies Aufsatz The addition of wood to polymers results in wood‐polymer composites (WPC), whereby the wood content can be up to 80 %. This composite is mainly processed in extruded deckings. The extrusion die is an essential part of the process, which determines both process parameters and the final product. A characteristic of WPC extrusion dies is a partial solidification of the melt before leaving the die. This solidification is necessary to ensure a dimensionally stable extrusion. For the design of WPC extrusion dies numerical flow field calculations are increasingly used. Based on rheological measurements, both the shear thinning flow behaviour and the temperature dependence of the viscosity are modelled. In the parallel zone a pure shear flow is present, while in the transition elements such as the flange to the extruder or the mandrel due to the cross‐sectional changes strain rates are dominant. High‐density polyethylene (HDPE) with wood fibers has shear thinning and strain thickening behavior, so different models are needed to describe it. The results of the numerical simulations are compared with experimental values of an extrusion die for a square hollow profile. open access Liese, Fabian Wünsch, Olaf doi:10.1002/pamm.202000221 Wood-Plastic-Composite Extruderwerkzeug Verbundwerkstoff Simulation publishedVersion EISSN 1617-7061 Issue 1 Proceedings in applied mathematics and mechanics (PAMM) Volume 20 false e202000221
Die folgenden Lizenzbestimmungen sind mit dieser Ressource verbunden: