The effect of fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites
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Huan-Chang Tseng
Abstract
In state-of-the-art predictive engineering software for injection molded fiber composites, it is challenging to discuss the effect of fiber properties, including fiber content and aspect ratio, on the shell-core fiber orientation and anisotropic flow front. Recently, the flow-fiber coupled model of informed isotropic (IISO) viscosity was proposed for simulating the realistic flow-induced fiber orientation. At present, one attempts to improve the IISO viscosity in relation to fiber content and aspect ratio. Therefore, injection molding simulations of 30 wt% and 50 wt% short glass fiber-reinforced Polyamide66 (30 wt% SGF/PA66 and 50 wt% SGF/PA66) are performed in the IISO flow-fiber couple 3D-FVM (three-dimensional finite volume method) computation under the fixed aspect ratio of a r = 20. As a result, the predicted fiber orientation distributions are in good agreement with related experimental data, while the core width is increased with fiber contents. In addition, the anisotropic ear flow occurs at the higher content. Based on shear viscosity of 30 wt% SGF/PA66, one can directly alter fiber content as 50 wt% SGF/PA66 in the IISO computation to anticipate the reliable trend of fiber orientation and flow behavior. When the a r = 20 short fiber is lengthened as the a r = 50 long fiber, the core obviously becomes the wider. It is significant to investigate the difference between the decoupled and coupled computation, as well as the influence of the flow-fiber coupled and fiber orientation model parameters.
Acknowledgments
Special thanks to DSM’s Materials Science Center for providing the experimental data and molded parts used in the research project.
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Research ethics: This original paper of single author is personal independent research and has not been published elsewhere, nor are they under consideration by another publisher.
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Author contributions: Single author of H. C. Tseng contributed to the implementation of the research, to the analysis of the results and to the writing of the manuscript.
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Competing interests: The author declares that he has no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Research funding: No funding.
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Data availability: Data will be made available on request.
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Artikel in diesem Heft
- Frontmatter
- Research Articles
- Effects of ZnO nanoparticles, polyethylene glycol 400, and polyoxyethylene sorbitan ester Tween 80 on PLA films properties
- Study on the thermal stability and smoke suppressant effect of polyurethane foam modified by ammonium lignosulfonate
- Fabrication of soybean oil-based polyol modified polyurethane foam from ammonium polyphosphate and its thermal stability and flame retardant properties
- The effect of fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites
- Experimental studies on water absorption and mechanical properties of Hibiscus sabdariffa (Roselle) and Urena lobata (Caesar weed) plant Fiber–Reinforced hybrid epoxy composites: effect of weight fraction of nano-graphene fillers
- A comparative study on adhesive properties of nanoparticle reinforced epoxy bonded single-strap repaired composites
- Analyzing pellet agglomeration in underwater polymer extrusion pelletizers: a numerical simulation study
- Melting mechanisms in corotating twin-screw extrusion: a critical review
- Analysis of mechanical and water absorption properties of hybrid composites reinforced with micron-size bamboo fibers and ceramic particles
