A Flow-Dependent Fiber Orientation Model
| Autor: | Argha Protim Dey, Susanne K. Kugler, Sandra Saad, Tim A. Osswald, Camilo Cruz, Armin Kech |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Fluid viscosity
fiber orientation Thermoplastic Materials science polymer composites Fiber orientation Macroscopic model Physics::Optics 02 engineering and technology computer.software_genre lcsh:Technology 01 natural sciences modeling 010305 fluids & plasmas Physics::Fluid Dynamics 0103 physical sciences lcsh:Science Engineering (miscellaneous) chemistry.chemical_classification lcsh:T Mechanics Polymer Fibre-reinforced plastic 021001 nanoscience & nanotechnology Simulation software chemistry Ceramics and Composites lcsh:Q 0210 nano-technology Shear flow computer |
| Zdroj: | Journal of Composites Science, Vol 4, Iss 96, p 96 (2020) Journal of Composites Science; Volume 4; Issue 3; Pages: 96 |
| ISSN: | 2504-477X |
| DOI: | 10.3390/jcs4030096 |
| Popis: | The mechanical performance of fiber reinforced polymers is dependent on the process-induced fiber orientation. In this work, we focus on the prediction of the fiber orientation in an injection-molded short fiber reinforced thermoplastic part using an original multi-scale modeling approach. A particle-based model developed for shear flows is extended to elongational flows. This mechanistic model for elongational flows is validated using an experiment, which was conducted for a long fiber reinforced polymer. The influence of several fiber descriptors and fluid viscosity on fiber orientation under elongational flow is studied at the micro-scale. Based on this sensitivity analysis, a common parameter set for a continuum-based fiber orientation macroscopic model is defined under elongational flow. We then develop a novel flow-dependent macroscopic fiber orientation, which takes into consideration the effect of both elongational and shear flow on the fiber orientation evolution during the filling of a mold cavity. The model is objective and shows better performance in comparison to state-of-the-art fiber orientation models when compared to μCT-based fiber orientation measurements for several industrial parts. The model is implemented using the simulation software Autodesk Moldflow Insight Scandium® 2019. |
| Databáze: | OpenAIRE |
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