Simulation framework for crystallization in melt flows of semi-crystalline polymers based on phenomenological models
| العنوان: | Simulation framework for crystallization in melt flows of semi-crystalline polymers based on phenomenological models |
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| المؤلفون: | Stefan Descher, Olaf Wünsch |
| المصدر: | Archive of Applied Mechanics. 92:1859-1878 |
| بيانات النشر: | Springer Science and Business Media LLC, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | crystallization, Kunststoff, Mechanical Engineering, Rheologie, viscoelastic fluids, Numerische Strömungssimulation, Differential scanning calorimetry, Kristallisation, OpenFOAM, rheology, Viskoelastizität, non-isothermal flows, CFD |
| الوصف: | 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. |
| تدمد: | 1432-0681 0939-1533 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a906ec92308e1c26509badac53feb63 https://doi.org/10.1007/s00419-022-02153-x |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....0a906ec92308e1c26509badac53feb63 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14320681 09391533 |
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