Titre : |
The effect of extensional viscosity on the core structure of fiber orientation for injection-molded fiber composites |
Type de document : |
texte imprimé |
Auteurs : |
Huan-Chang Tseng, Auteur |
Année de publication : |
2023 |
Article en page(s) : |
p. 456-471 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Composites à fibres de verre Composites à fibres de verre -- Moulage par injection Composites à fibres longues Fibres longues Fluides newtoniens IsotropieL'isotropie caractérise l’invariance des propriétés physiques d’un milieu en fonction de la direction. Le contraire de l’isotropie est l’anisotropie. Polypropylène Prévision, Théorie de la Simulation par ordinateur
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Index. décimale : |
668.4 Plastiques, vinyles |
Résumé : |
The famous informed isotropic (IISO) viscosity successfully dominates the broader core structure of fiber orientation distributions for injection-molded long fiber composites, due to the flow-fiber coupling effect of stretching deformation. Recently, the GNF-X (Generalized Newtonian Fluid eXtended) constitutive equation of weighted shear/extensional viscosity has been shown to possess the potential to demonstrate the extension-induced corner vortex in the entry flow of a polymer melt. Using GNF-X, three-dimensional injection-molding flow simulations of a center-gated disk are, therefore, performed for verifying the effect of extensional viscosity on the core structure of fiber orientation, namely, the extension-induced fiber orientation. The equivalent of GNF-X and IISO is demonstrated for predicting fiber orientation distribution, while their primary parameter relationship is particularly found herein. It is significant to visualize dramatic patterns of extensional rate occurring in the center-gated disk simulation. |
Note de contenu : |
- THEORETICAL BACKGROUND : GNF shear viscosity - GNF-X weighted viscosity - IISO flow-fiber coupling - iARD-RPR orientation equation
- RESULTS AND DISCUSSION : Extension-induced fiber orientation of core region - The equivalent of GNF-X and IISO - Parameter relationship between GNF-X and IISO
- Table 1 : Viscosiy model parameters for 30 % SGF/PP at 200 °C
- Table 2 : Stretching ratio at different flow types and orientation states
- Table 3 : Viscosiy model parameters for the 40 % LGF/PP composite |
DOI : |
https://doi.org/10.1515/ipp-2023-4368 |
En ligne : |
https://drive.google.com/file/d/1vo8JECdjbnVVnlopacxPYfksoEpbhrMz/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40108 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 4 (2023) . - p. 456-471