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Viscoelastic Effects on the Response of Electroelastic Materials
Electroelastic materials, as for example, 3M VHB 4910, are attracting attention as actuators or generators in some developments and applications. This is due to their capacity of being deformed when submitted to an electric field. Some models of their actuation are available, but recently, viscoelas...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272088/ https://www.ncbi.nlm.nih.gov/pubmed/34279342 http://dx.doi.org/10.3390/polym13132198 |
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author | Diaz-Calleja, Ricardo Ginestar, Damián Compañ Moreno, Vícente Llovera-Segovia, Pedro Burgos-Simón, Clara Cortés, Juan Carlos Quijano, Alfredo Díaz-Boils, Joaquín |
author_facet | Diaz-Calleja, Ricardo Ginestar, Damián Compañ Moreno, Vícente Llovera-Segovia, Pedro Burgos-Simón, Clara Cortés, Juan Carlos Quijano, Alfredo Díaz-Boils, Joaquín |
author_sort | Diaz-Calleja, Ricardo |
collection | PubMed |
description | Electroelastic materials, as for example, 3M VHB 4910, are attracting attention as actuators or generators in some developments and applications. This is due to their capacity of being deformed when submitted to an electric field. Some models of their actuation are available, but recently, viscoelastic models have been proposed to give an account of the dissipative behaviour of these materials. Their response to an external mechanical or electrical force field implies a relaxation process towards a new state of thermodynamic equilibrium, which can be described by a relaxation time. However, it is well known that viscoelastic and dielectric materials, as for example, polymers, exhibit a distribution of relaxation times instead of a single relaxation time. In the present approach, a continuous distribution of relaxation times is proposed via the introduction of fractional derivatives of the stress and strain, which gives a better account of the material behaviour. The application of fractional derivatives is described and a comparison with former results is made. Then, a double generalisation is carried out: the first one is referred to the viscoelastic or dielectric models and is addressed to obtain a nonsymmetric spectrum of relaxation times, and the second one is the adoption of the more realistic Mooney–Rivlin equation for the stress–strain relationship of the elastomeric material. A modified Mooney–Rivlin model for the free energy density of a hyperelastic material, VHB 4910 has been used based on experimental results of previous authors. This last proposal ensures the appearance of the bifurcation phenomena which is analysed for equibiaxial dead loads; time-dependent bifurcation phenomena are predicted by the extended Mooney–Rivlin equations. |
format | Online Article Text |
id | pubmed-8272088 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-82720882021-07-11 Viscoelastic Effects on the Response of Electroelastic Materials Diaz-Calleja, Ricardo Ginestar, Damián Compañ Moreno, Vícente Llovera-Segovia, Pedro Burgos-Simón, Clara Cortés, Juan Carlos Quijano, Alfredo Díaz-Boils, Joaquín Polymers (Basel) Article Electroelastic materials, as for example, 3M VHB 4910, are attracting attention as actuators or generators in some developments and applications. This is due to their capacity of being deformed when submitted to an electric field. Some models of their actuation are available, but recently, viscoelastic models have been proposed to give an account of the dissipative behaviour of these materials. Their response to an external mechanical or electrical force field implies a relaxation process towards a new state of thermodynamic equilibrium, which can be described by a relaxation time. However, it is well known that viscoelastic and dielectric materials, as for example, polymers, exhibit a distribution of relaxation times instead of a single relaxation time. In the present approach, a continuous distribution of relaxation times is proposed via the introduction of fractional derivatives of the stress and strain, which gives a better account of the material behaviour. The application of fractional derivatives is described and a comparison with former results is made. Then, a double generalisation is carried out: the first one is referred to the viscoelastic or dielectric models and is addressed to obtain a nonsymmetric spectrum of relaxation times, and the second one is the adoption of the more realistic Mooney–Rivlin equation for the stress–strain relationship of the elastomeric material. A modified Mooney–Rivlin model for the free energy density of a hyperelastic material, VHB 4910 has been used based on experimental results of previous authors. This last proposal ensures the appearance of the bifurcation phenomena which is analysed for equibiaxial dead loads; time-dependent bifurcation phenomena are predicted by the extended Mooney–Rivlin equations. MDPI 2021-07-01 /pmc/articles/PMC8272088/ /pubmed/34279342 http://dx.doi.org/10.3390/polym13132198 Text en © 2021 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 Diaz-Calleja, Ricardo Ginestar, Damián Compañ Moreno, Vícente Llovera-Segovia, Pedro Burgos-Simón, Clara Cortés, Juan Carlos Quijano, Alfredo Díaz-Boils, Joaquín Viscoelastic Effects on the Response of Electroelastic Materials |
title | Viscoelastic Effects on the Response of Electroelastic Materials |
title_full | Viscoelastic Effects on the Response of Electroelastic Materials |
title_fullStr | Viscoelastic Effects on the Response of Electroelastic Materials |
title_full_unstemmed | Viscoelastic Effects on the Response of Electroelastic Materials |
title_short | Viscoelastic Effects on the Response of Electroelastic Materials |
title_sort | viscoelastic effects on the response of electroelastic materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272088/ https://www.ncbi.nlm.nih.gov/pubmed/34279342 http://dx.doi.org/10.3390/polym13132198 |
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