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Modeling injection molding of high-density polyethylene with crystallization in open-source software
Krebelj, Kristjan (Author), Krebelj, Anton (Author), Halilovič, Miroslav (Author), Mole, Nikolaj (Author)

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Abstract
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

Language:English
Keywords:injection molding, numerical simulation, polymer crystallization, open-source code
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2021
Number of pages:f. 1-15
Numbering:Vol. 13, iss. 1
UDC:519.876.5:621.767(045)
ISSN on article:2073-4360
DOI:10.3390/polym13010138 Link is opened in a new window
COBISS.SI-ID:45067779 Link is opened in a new window
License:CC BY 4.0
This work is available under this license: Creative Commons Attribution 4.0 International
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Record is a part of a journal

Title:Polymers
Shortened title:Polymers
Publisher:MDPI
ISSN:2073-4360
COBISS.SI-ID:517951257 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0263
Name:Mehanika v tehniki
Acronym:SIM VIA-2

Secondary language

Language:Slovenian
Keywords:injekcijsko brizganje, numerične simulacije, kristalizacija polimerov, odprtokodni programi

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