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Open AccessArticle

Modeling Injection Molding of High-Density Polyethylene with Crystallization in Open-Source Software

1
Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva, 1000 Ljubljana, Slovenia
2
Tehnoplast, Razvojno raziskovalna skupina, Neverke 30, 6256 Košana, Slovenia
*
Author to whom correspondence should be addressed.
Polymers 2021, 13(1), 138; https://doi.org/10.3390/polym13010138
Received: 22 December 2020 / Revised: 28 December 2020 / Accepted: 28 December 2020 / Published: 31 December 2020
(This article belongs to the Section Polymer Physics and Theory)
This work investigates crystallization modeling by modifying an open-source computational fluid dynamics code OpenFOAM. The crystallization behavior of high-density polyethylene (HDPE) is implemented according to theoretical and experimental literature. A number of physical interdependencies are included. The cavity is modeled as deformable. The heat transfer coefficient in the thermal contact towards the mold depends on contact pressure. The thermal conductivity is pressure- and crystallinity-dependent. Specific heat depends on temperature and crystallinity. Latent heat is released according to the crystallization progress and temperature. Deviatoric elastic stress is evolved in the solidified material. The prediction of the cavity pressure evolution is used for the assessment of the solution quality because it is experimentally available and governs the residual stress development. Insight into the thermomechanical conditions is provided with through-thickness plots of pressure, temperature and cooling rate at different levels of crystallinity. The code and simulation setup are made openly available to further the research on the topic. View Full-Text
Keywords: injection molding; numerical simulation; polymer crystallization; open-source code injection molding; numerical simulation; polymer crystallization; open-source code
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  • Externally hosted supplementary file 1
    Doi: 10.5281/zenodo.4314423
    Link: https://zenodo.org/record/4314423
    Description: The developed code and simulation setup, openInjMoldDyMSimCr for OpenFOAM.
MDPI and ACS Style

Krebelj, K.; Krebelj, A.; Halilovič, M.; Mole, N. Modeling Injection Molding of High-Density Polyethylene with Crystallization in Open-Source Software. Polymers 2021, 13, 138. https://doi.org/10.3390/polym13010138

AMA Style

Krebelj K, Krebelj A, Halilovič M, Mole N. Modeling Injection Molding of High-Density Polyethylene with Crystallization in Open-Source Software. Polymers. 2021; 13(1):138. https://doi.org/10.3390/polym13010138

Chicago/Turabian Style

Krebelj, Kristjan; Krebelj, Anton; Halilovič, Miroslav; Mole, Nikolaj. 2021. "Modeling Injection Molding of High-Density Polyethylene with Crystallization in Open-Source Software" Polymers 13, no. 1: 138. https://doi.org/10.3390/polym13010138

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