Multi-scale computational fluid dynamics of impregnation die for thermoplastic carbon fiber prepreg production
| Autor: | Moon-Heui Hahn, Young-Il Lim, Jaeho Jung, Yun-Hyuk Bang, Son Ich Ngo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
business.product_category Thermoplastic Materials science business.industry General Chemical Engineering 02 engineering and technology Computational fluid dynamics 021001 nanoscience & nanotechnology Computer Science Applications Volumetric flow rate Viscosity 020401 chemical engineering chemistry Pultrusion Polymer chemistry Polyamide Die (manufacturing) 0204 chemical engineering Composite material 0210 nano-technology business Porous medium |
| Zdroj: | Computers & Chemical Engineering. 103:58-68 |
| ISSN: | 0098-1354 |
| DOI: | 10.1016/j.compchemeng.2017.03.007 |
| Popis: | A multi-scale computational fluid dynamics (CFD) model of a pultrusion process was proposed for unidirectional carbon fiber (UD-CF) prepreg production. Polyamide 6 (PA6) and polyacrylonitrile-based CF were used as the thermoplastic polymer matrix and reinforcement, respectively. The non-Newtonian viscosity of PA6 was expressed by Carreau's model. A micro-scale CFD model was constructed to obtain a proper resin permeability to CF filaments, while the tow domain was treated as sliding porous media in the macro-scale CFD. The resin velocity profile showed a similar shape to the relative resin amount experimentally measured in the UD-CF prepreg. The uniformity index of the resin velocity (UIv) on the outlet surface was calculated for 45 case studies with several tow speeds and resin flow rates. The tow speed showing a maximum UIv was remarkably well expressed as a linear function of the slip velocity, which is the difference between the tow speed and resin velocity. |
| Databáze: | OpenAIRE |
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