Research Article | OPEN ACCESS
Analysis of Residual Stress of Injected Plastic Parts: A Multivariable Approach
1Carlos A. Vargas Isaza, 2Juan C. Posada, 3M. Juan Diego Sierra, 4Alvaro J. Castro-Caicedo and 5Juan F. Botero-Cadavid
1Department of Electromechanical and Mechatronic Engineering, Faculty of Engineering, Instituto Tecnológico Metropolitano,
2Faculty of Economic and Administrative Sciences, Instituto Tecnológico Metropolitano,
3Polymer and Chemical Engineering Consultant,
4Department of Materials and Minerals, Universidad Nacional de Colombia-Medellín, Colombia
5School of Physics, Universidad Nacional de Colombia-Medellín Campus, Colombia
Research Journal of Applied Sciences, Engineering and Technology 2021 2:43-58
Received: March 4, 2020 | Accepted: April 30 2020 | Published: May 25, 2021
Abstract
The analysis of residual stresses generated during the injection molding process is crucial for the part quality assessment. The present study evaluates the generation of residual stress considering different variables that affect them. For that purpose, diverse part geometries were evaluated with different polymers (polycarbonate, ABS and polypropylene) and some Design of Experiments (DOE) were implemented in a simulation software of injection molding process (Moldex 3D). The results show higher residual stresses in thick wall parts due to unbalanced cooling through-thickness. For thin-wall parts, residual stresses were lower because of better cooling through its thickness. The polycarbonate was the more sensitive polymer to residual stresses upon its processing conditions, being the mold temperature and the packing stage the most critical variables to increase or reduce residual stresses.
Keywords:
Design of experiments, injection molding, internal stresses, residual stresses, simulation,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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