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Correlation Between Fiber Orientation and Geometrical Shrinkage of Injected Parts Under the Influence of Flow-Fiber Coupling Effect

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Abstract

Fiber reinforced thermoplastics (FRP) have been widely used in automotive industry. However, how does the flow-fiber coupling effect influence the micro fiber orientation and further affect the geometrical shrinkage of the final part that is not fully understood yet. In this study, a complex center-gated plate has been applied to study the influence of the flow-fiber coupling effect on the fiber orientation variation and the geometrical change through numerical simulation. Then the practical verification through the micro-computed tomography (micro-CT) and image processing technology was carried out. Results show that in the presence of the flow-fiber coupling the required spruce pressure will be higher compared to no coupling case. In addition, the melt flow front pattern will be changed from “convex-flat” to “convex-concave” under the influence of this coupling. Moreover, in the presence of the flow-fiber coupling effect, the wider core width for fiber orientation tensor in the flow direction (A11) can be obtained from upstream to downstream regions for the same model. However, in the downstream region (i.e. in the FR), the flow-fiber coupling effect is more significantly due to the action of less shear rate in that region. Finally, through the measurement of the left–right asymmetrical shape of the FR for Model I (or Model II), the reason is that the flow-fiber coupling effect will switch the fiber orientation from the flow direction (A11) dominate to the cross-flow direction (A22) dominate. This asymmetrical fiber orientation distribution will further create that asymmetrical shrinkage shape of final part. The correlation between fiber orientation and geometrical shrinkage can be achieved.

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References

  1. CompositesWorld Report, Composites end markets: Automotive (2022), https://www.compositesworld.com/articles/composites-end-markets-automotive-2022, published: 2022/12/02, Accessed: 2022/02/02.

  2. Othman, R., Ismail, N. I., Pahmi, M. A. A. H., Basri, M. H. M., Sharudin, H., & Hemdi, A. R. (2018). Application of carbon fiber reinforced plastics in automotive industry: A review. Journal of Mechanical Manufacturing, 1, 144–154.

    Google Scholar 

  3. U. S. Department of Energy report, Materials 2018 annual progress report (2018), Office of Energy Efficiency and Renewable Energy.

  4. Der, A., Kaluza, A., Reimer, L., Herrmann, C., & Thiede, S. (2022). Integration of energyoriented manufacturing simulation into the life cycle evaluation of lightweight body parts. International Journal of Precision Engineering and Manufacturing-Green Technology, Published online, 2022(01/03), 1–18. https://doi.org/10.1007/s40684-021-00412-w

    Article  Google Scholar 

  5. Garate, J., Solovitz, S. A., & Kim, D. (2018). Fabrication and performance of segmented thermoplastic composite wind turbine blades. International Journal of Precision Engineering and Manufacturing-Green Technology, 5, 271–277.

    Article  Google Scholar 

  6. Thomason, J. L., & Vlug, M. A. (1996). Influence of fiber length and concentration on the properties of glass fiber-reinforced polypropylene: Part 1-Tensile and flexural modulus. Composites, 27A, 477–484.

    Article  Google Scholar 

  7. Thomason, J. L. (2007). The influence of fibre length and concentration on the properties of glass fibre reinforced polypropylene: Interface strength and fibre strain in injection moulded long fibre PP at high fibre content. Compost. Part A Appl. Sci. Manuf., 38, 210–216.

    Article  Google Scholar 

  8. Wang, C., & Yang, S. (2013). Thermal, tensile and dynamic mechanical properties of short carbon fibre reinforced polypropylene composites. Polymer & Polymer Composites, 21(2), 65–71.

    Article  Google Scholar 

  9. Cilleruelo, L., Lafranche, E., Krawczak, P., Pardo, P., & Lucas, P. (2012). Injection moulding of long glass fibre reinforced poly(ethylene terephtalate): Influence of carbon black and nucleating agents on impact properties. Express Polymer Letters, 6(9), 706–718.

    Article  Google Scholar 

  10. Rohde, M., Ebel, A., Wolff-Fabris, F., & Altstädt, V. (2011). Influence of processing parameters on the fiber length and impact properties of injection molded long glass fiber reinforced polypropylene. International polymer processing, 26(3), 292–303.

    Article  Google Scholar 

  11. Goris, S., Back, T., Yanev, A., Brands, D., Drummer, D., & Osswald, T. A. (2018). A novel fiber length measurement technique for discontinuous fiber-reinforced composites: A comparative study with existing methods. Polymer Composites, 39(11), 4058–4070.

    Article  Google Scholar 

  12. Nguyen, B. N., Bapanapalli, S. K., Holbery, J. D., Smith, M. T., Kunc, V., Frame, B. J., Phelps, J. H., & Tucker, C. L. (2008). Fiber length and orientation in long-fiber injection-molded thermoplastics-Part I: Modeling of microstructure and elastic Properties. Journal of Composite Materials, 42(10), 1003–1029.

    Article  Google Scholar 

  13. Bernasconi, A., Cosmi, F., & Hine, P. J. (2012). Analysis of fibre orientation distribution in short fibre reinforced polymers: A comparison between optical and tomographic methods. Composites Science and Technology, 72, 2002–2008.

    Article  Google Scholar 

  14. Gandhi, U., Goris, S., & D. B., Kunc, V. and Song, Y. Y. (2015). Method to measure orientation of discontinuous fiber embedded in the polymer matrix from computerized tomography scan data. Journal of Thermoplastic Composite Materials, 29(12), 1–14. https://doi.org/10.1177/0892705715584411

    Article  Google Scholar 

  15. Teuwsen, J., Goris, S. and Osswald, T. A. (2017). Impact of the process-induced microstructure on the mechanical performance of injection molded long glass fiber reinforced polypropylene, SPE ANTEC Annual Tech Paper, 626–635.

  16. Huang, C. T., Chu, J. H., Fu, W. W., Hsu, C., & Hwang, S. J. (2021). Flow-induced orientations of fibers and their influences on warpage and mechanical property in injection fiber reinforced plastic (FRP) Parts. International Journal of Precision Engineering and Manufacturing-Green Technology, 8(3), 917–934.

    Article  Google Scholar 

  17. Folgar, F., & Tucker, C. L. (1984). Orientation behavior of fibers in concentrated suspensions. Journal of Reinforced Plastics and Composites., 3(2), 98–119.

    Article  Google Scholar 

  18. Advani, S. G., & Tucker, C. L. (1987). The use of tensors to describe and predict fiber orientation in short fiber composites”. Journal of Rheology, 31(8), 751–784.

    Article  Google Scholar 

  19. Advani, S. G. (1994). Flow and Rheology in Polymer Composites Manufacturing. Elsevier.

    Google Scholar 

  20. Vincent, M., Giroud, T., Clarke, A., & Eberhardt, C. (2005). Description and modeling of fiber orientation in injection molding of fiber reinforced thermoplastics. Polymer, 46(17), 6719–6725.

    Article  Google Scholar 

  21. Ortman, K., Baird, D., Wapperom, P., & Aning, A. (2012). Prediction of fiber orientation in the iInjection molding of long fiber suspensions. Polymer composites, 33(8), 1360–1367.

    Article  Google Scholar 

  22. Phelps, J. H., & Tucker, C. L., III. (2009). An anisotropic rotary diffusion model for fiber orientation in short- and long-fiber thermoplastics. J. Non-Newton. Fluid Mech., 56, 165–176.

    Article  MATH  Google Scholar 

  23. Wang, J., O’Gara, J. F., & Tucker, C. L., III. (2008). An objective model for slow orientation kinetics in concentrated fiber suspensions: Theory and rheological evidence. Journal of Rheology, 52, 1179–1200.

    Article  Google Scholar 

  24. Wang, J. and **, X. (2010). Comparison of recent fiber orientation models in autodesk moldflow insight simulations with measured fiber orientation data, Proceedings of the Polymer Processing Society 26th Annual Meeting (PPS-26), July 4–8, 2010, Banff, Canada.

  25. Tseng, H. C., Chang, R. Y., & Hsu, C. H. (2013). Phenomenological improvements to predictive models of fiber orientation in concentrated suspensions. Journal of Rheology, 57, 1597–1631.

    Article  Google Scholar 

  26. Foss, P. H., Tseng, H.-C., Snawerdt, J., Chang, Y.-J., Yang, W.-H., & Hsu, C.-H. (2014). Prediction of fiber orientation distribution in injection molded parts using Moldex3D simulation. Polymer Composites, 35(4), 671–680.

    Article  Google Scholar 

  27. Libscomb, G. G., Denn, M. M., Hur, D. U., & Boger, D. V. (1988). The flow of fiber suspensions in complex geometries. J. Non-Newt. Fluid Mech., 26, 297–325.

    Article  Google Scholar 

  28. VerWeyst, B. E., & Tucker, C. L., III. (2002). Fiber suspensions in complex geometries: Flow/orientation coupling. Canadian Journal of Chemical Engineering, 80, 1093–1106.

    Article  Google Scholar 

  29. Tseng, H.C., and Su, T.H. “Coupled flow and fiber orientation analysis for 3D injection molding simulations of fiber composites”, Proceedings of the Polymer Processing Society 34th Annual Meeting (PPS-34), AIP Conf. Proc. 2065, 030021–1–030021–5; https://doi.org/10.1063/1.5088279.

  30. Favaloro, A. J., Tseng, H. C., & Pipes, R. B. (2018). A new anisotropic viscous constitutive model or composite molding simulation. Composite Part A, 115, 112–122.

    Article  Google Scholar 

  31. Tseng, H. C., & Favaloro, A. J. (2019). The use of informed isotropic constitutive equation to simulate anisotropic rheological behaviors in fiber suspensions. Journal of Rheology, 63, 263–274.

    Article  Google Scholar 

  32. Huang, C. T., & Lai, C. H. (2020). Investigation on the coupling effects between flow and fibers on fiber-reinforced plastic (FRP) injection parts. Polymers, 12(10), 2274.

    Article  Google Scholar 

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Acknowledgements

The authors would like to thank Ministry of Science and Technology of Taiwan, R.O.C. (Project number: MOST 110-2221-E-032 -015 -; MOST 108-2221-E-032-013-MY2; MOST 107-2622-E-006 -024 -CC1) for partly financially supporting for this research.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, Tamkang University, New No. 151, Yingzhuan Rd., Tamsui Dist., Taipei City, 251, Taiwan

    Chao-Tsai Huang, Jun-Zheng Wang & Cheng-Hong Lai

  2. Department of Mechanical Engineering, National Cheng Kung University, Tainan City, 701, Taiwan

    Sheng-Jye Hwang

  3. Department of Mechanical and Computer-Aided Eng., Feng Chia University, Taichung City, 407, Taiwan

    Po-Wei Huang & Hsin-Shu Peng

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Huang, CT., Wang, JZ., Lai, CH. et al. Correlation Between Fiber Orientation and Geometrical Shrinkage of Injected Parts Under the Influence of Flow-Fiber Coupling Effect. Int. J. of Precis. Eng. and Manuf.-Green Tech. 10, 1039–1060 (2023). https://doi.org/10.1007/s40684-022-00473-5

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