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Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent
Microinjection molding technology for degradable polymer stents has good development potential. However, there is a very complicated relationship between molding quality and process parameters of microinjection, and it is hard to determine the best combination of process parameters to optimize the m...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267175/ https://www.ncbi.nlm.nih.gov/pubmed/30463214 http://dx.doi.org/10.3390/ma11112322 |
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author | Li, Hongxia Liu, Kui Zhao, Danyang Wang, Minjie Li, Qian Hou, Jianhua |
author_facet | Li, Hongxia Liu, Kui Zhao, Danyang Wang, Minjie Li, Qian Hou, Jianhua |
author_sort | Li, Hongxia |
collection | PubMed |
description | Microinjection molding technology for degradable polymer stents has good development potential. However, there is a very complicated relationship between molding quality and process parameters of microinjection, and it is hard to determine the best combination of process parameters to optimize the molding quality of polymer stent. In this study, an adaptive optimization method based on the kriging surrogate model is proposed to reduce the residual stress and warpage of stent during its injection molding. Integrating design of experiment (DOE) methods with the kriging surrogate model can approximate the functional relationship between design goals and design variables, replacing the expensive reanalysis of the stent residual stress and warpage during the optimization process. In this proposed optimization algorithm, expected improvement (EI) is used to balance local and global search. The finite element method (FEM) is used to simulate the micro-injection molding process of polymer stent. As an example, a typical polymer vascular stent ART18Z was studied, where four key process parameters are selected to be the design variables. Numerical results demonstrate that the proposed adaptive optimization method can effectively decrease the residual stress and warpage during the stent injection molding process. |
format | Online Article Text |
id | pubmed-6267175 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62671752018-12-17 Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent Li, Hongxia Liu, Kui Zhao, Danyang Wang, Minjie Li, Qian Hou, Jianhua Materials (Basel) Article Microinjection molding technology for degradable polymer stents has good development potential. However, there is a very complicated relationship between molding quality and process parameters of microinjection, and it is hard to determine the best combination of process parameters to optimize the molding quality of polymer stent. In this study, an adaptive optimization method based on the kriging surrogate model is proposed to reduce the residual stress and warpage of stent during its injection molding. Integrating design of experiment (DOE) methods with the kriging surrogate model can approximate the functional relationship between design goals and design variables, replacing the expensive reanalysis of the stent residual stress and warpage during the optimization process. In this proposed optimization algorithm, expected improvement (EI) is used to balance local and global search. The finite element method (FEM) is used to simulate the micro-injection molding process of polymer stent. As an example, a typical polymer vascular stent ART18Z was studied, where four key process parameters are selected to be the design variables. Numerical results demonstrate that the proposed adaptive optimization method can effectively decrease the residual stress and warpage during the stent injection molding process. MDPI 2018-11-19 /pmc/articles/PMC6267175/ /pubmed/30463214 http://dx.doi.org/10.3390/ma11112322 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Hongxia Liu, Kui Zhao, Danyang Wang, Minjie Li, Qian Hou, Jianhua Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title | Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title_full | Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title_fullStr | Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title_full_unstemmed | Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title_short | Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent |
title_sort | multi-objective optimizations for microinjection molding process parameters of biodegradable polymer stent |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267175/ https://www.ncbi.nlm.nih.gov/pubmed/30463214 http://dx.doi.org/10.3390/ma11112322 |
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