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Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials

For rubber-like materials, there are three popular methods of equibiaxial tension available: inflation tension, equibiaxial planar tension, and radial tension. However, no studies have addressed the accuracy and comparability of these tests. In this work, we model the tension tests for a hyperelasti...

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Autores principales: Luo, Huaan, Zhu, Yinlong, Zhao, Haifeng, Ma, Luqiang, Zhang, Jingjing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10490221/
https://www.ncbi.nlm.nih.gov/pubmed/37688187
http://dx.doi.org/10.3390/polym15173561
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author Luo, Huaan
Zhu, Yinlong
Zhao, Haifeng
Ma, Luqiang
Zhang, Jingjing
author_facet Luo, Huaan
Zhu, Yinlong
Zhao, Haifeng
Ma, Luqiang
Zhang, Jingjing
author_sort Luo, Huaan
collection PubMed
description For rubber-like materials, there are three popular methods of equibiaxial tension available: inflation tension, equibiaxial planar tension, and radial tension. However, no studies have addressed the accuracy and comparability of these tests. In this work, we model the tension tests for a hyperelastic electroactive polymer (EAP) membrane material using finite element method (FEM) and investigate their experimental accuracy. This study also analyzes the impact of apparatus structure parameters and specimen dimensions on experimental performances. Additionally, a tensile efficiency is proposed to assess non-uniform deformation in equibiaxial planar tension and radial tension tests. The sample points for calculating deformation in inflation tensions should be taken near the top of the inflated balloon to obtain a more accurate characteristic curve; the deformation simulation range will be constrained by the material model and its parameters within a specific limit (λ ≈ 1.9); if the inflation hole size is halved, the required air pressure must be doubled to maintain equivalent stress and strain values, resulting in a reduction in half in inflation height and decreased accuracy. The equibiaxial planar tension test can enhance uniform deformation and reduce stress errors to as low as 2.1% (at λ = 4) with single-corner-point tension. For circular diaphragm specimens in radial tension tests, increasing the number of cuts and using larger punched holes results in more uniform deformation and less stress error, with a minimum value of 3.83% achieved for a specimen with 24 cuts and a 5 mm punched hole. In terms of tensile efficiency, increasing the number of tensile points in the equibiaxial planar tension test can improve it; under radial tension, increasing the number of cuts and decreasing the diameter of the punched hole on the specimen has a hedging effect. The findings of this study are valuable for accurately evaluating various equibiaxial tension methods and analyzing their precision, as well as providing sound guidance for the effective design of testing apparatus and test plans.
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spelling pubmed-104902212023-09-09 Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials Luo, Huaan Zhu, Yinlong Zhao, Haifeng Ma, Luqiang Zhang, Jingjing Polymers (Basel) Article For rubber-like materials, there are three popular methods of equibiaxial tension available: inflation tension, equibiaxial planar tension, and radial tension. However, no studies have addressed the accuracy and comparability of these tests. In this work, we model the tension tests for a hyperelastic electroactive polymer (EAP) membrane material using finite element method (FEM) and investigate their experimental accuracy. This study also analyzes the impact of apparatus structure parameters and specimen dimensions on experimental performances. Additionally, a tensile efficiency is proposed to assess non-uniform deformation in equibiaxial planar tension and radial tension tests. The sample points for calculating deformation in inflation tensions should be taken near the top of the inflated balloon to obtain a more accurate characteristic curve; the deformation simulation range will be constrained by the material model and its parameters within a specific limit (λ ≈ 1.9); if the inflation hole size is halved, the required air pressure must be doubled to maintain equivalent stress and strain values, resulting in a reduction in half in inflation height and decreased accuracy. The equibiaxial planar tension test can enhance uniform deformation and reduce stress errors to as low as 2.1% (at λ = 4) with single-corner-point tension. For circular diaphragm specimens in radial tension tests, increasing the number of cuts and using larger punched holes results in more uniform deformation and less stress error, with a minimum value of 3.83% achieved for a specimen with 24 cuts and a 5 mm punched hole. In terms of tensile efficiency, increasing the number of tensile points in the equibiaxial planar tension test can improve it; under radial tension, increasing the number of cuts and decreasing the diameter of the punched hole on the specimen has a hedging effect. The findings of this study are valuable for accurately evaluating various equibiaxial tension methods and analyzing their precision, as well as providing sound guidance for the effective design of testing apparatus and test plans. MDPI 2023-08-27 /pmc/articles/PMC10490221/ /pubmed/37688187 http://dx.doi.org/10.3390/polym15173561 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Luo, Huaan
Zhu, Yinlong
Zhao, Haifeng
Ma, Luqiang
Zhang, Jingjing
Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title_full Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title_fullStr Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title_full_unstemmed Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title_short Simulation Analysis of Equibiaxial Tension Tests for Rubber-like Materials
title_sort simulation analysis of equibiaxial tension tests for rubber-like materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10490221/
https://www.ncbi.nlm.nih.gov/pubmed/37688187
http://dx.doi.org/10.3390/polym15173561
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