Datum
2022-04-16Schlagwort
660 Chemische Verfahrenstechnik, Technische Chemie KristallisationViskoelastizitätRheologieDifferential scanning calorimetryNumerische StrömungssimulationKunststoffMetadata
Zur Langanzeige
Aufsatz
Simulation framework for crystallization in melt flows of semi-crystalline polymers based on phenomenological models
Zusammenfassung
Polymer components are shaped mostly out of the molten state. As in the case of semi-crystalline polymers, crystallization can be suppressed by shock cooling, thermal process design allows to influence the solid bodies properties. A simulation approach that enables to predict these properties based on a forecast of crystallinity is presented in this paper. The main effects to consider and possibilities of modeling and simulation are discussed. A detailed description of how to create an experimental foundation using dynamic scanning calorimetry (DSC) and a rheometer is provided. Suppression of crystallization is modeled by a novel phenomenological approach, based on data over a large band of cooling rates. Special focus is put on parameter identification and extension of insufficient DSC data. The mechanical behavior is modeled using a weighted approach based on a nonlinear-thermoviscoelastic model for the molten state and a highly viscous Newtonian model for the solid state. Parameterization of both models is highlighted. An implementation in OpenFOAM is documented, emphasizing specific methods that were applied. Results of simulations for a simplified profile extrusion and injection molding case are presented. Basic relationships are forecasted correctly by the method, and important findings are presented for both processes.
Zitierform
In: Archive of Applied Mechanics Volume 92 / Issue 6 (2022-04-16) , S. 1859-1878 ; eissn:1432-0681Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202205186203,
author={Descher, Stefan and Wünsch, Olaf},
title={Simulation framework for crystallization in melt flows of semi-crystalline polymers based on phenomenological models},
journal={Archive of Applied Mechanics},
year={2022}
}
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2022-07-25T11:27:29Z 2022-07-25T11:27:29Z 2022-04-16 doi:10.17170/kobra-202205186203 http://hdl.handle.net/123456789/14013 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ crystallization viscoelastic fluids rheology CFD OpenFOAM non-isothermal flows 660 Simulation framework for crystallization in melt flows of semi-crystalline polymers based on phenomenological models Aufsatz Polymer components are shaped mostly out of the molten state. As in the case of semi-crystalline polymers, crystallization can be suppressed by shock cooling, thermal process design allows to influence the solid bodies properties. A simulation approach that enables to predict these properties based on a forecast of crystallinity is presented in this paper. The main effects to consider and possibilities of modeling and simulation are discussed. A detailed description of how to create an experimental foundation using dynamic scanning calorimetry (DSC) and a rheometer is provided. Suppression of crystallization is modeled by a novel phenomenological approach, based on data over a large band of cooling rates. Special focus is put on parameter identification and extension of insufficient DSC data. The mechanical behavior is modeled using a weighted approach based on a nonlinear-thermoviscoelastic model for the molten state and a highly viscous Newtonian model for the solid state. Parameterization of both models is highlighted. An implementation in OpenFOAM is documented, emphasizing specific methods that were applied. Results of simulations for a simplified profile extrusion and injection molding case are presented. Basic relationships are forecasted correctly by the method, and important findings are presented for both processes. open access Descher, Stefan Wünsch, Olaf doi:10.1007/s00419-022-02153-x Kristallisation Viskoelastizität Rheologie Differential scanning calorimetry Numerische Strömungssimulation Kunststoff publishedVersion eissn:1432-0681 Issue 6 Archive of Applied Mechanics 1859-1878 Volume 92 false
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