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Modeling injection molding of high-density polyethylene with crystallization in open-source software
ID Krebelj, Kristjan (Author), ID Krebelj, Anton (Author), ID Halilovič, Miroslav (Author), ID 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
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:15 str.
Numbering:Vol. 13, iss. 1, art. 138
PID:20.500.12556/RUL-124121 This link opens in a new window
UDC:519.876.5:621.767(045)
ISSN on article:2073-4360
DOI:10.3390/polym13010138 This link opens in a new window
COBISS.SI-ID:45067779 This link opens in a new window
Publication date in RUL:04.01.2021
Views:774
Downloads:339
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Record is a part of a journal

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

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.01.2021

Secondary language

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

Projects

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:P2-0263
Name:Mehanika v tehniki

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