Effect of pre-strain on compression mode properties of magnetorheological elastomers

The effects of pre-strain on compression mode dynamic characteristics of both isotropic and aligned magnetorheological elastomers (MREs) are experimentally investigated considering wide ranges of particle volume fraction (15%, 30%, and 45%), frequency (1–30 Hz), and magnetic flux density (0–750 mT)...

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Autores principales:	Hossein Vatandoost, Ramin Sedaghati, Subhash Rakheja, Masoud Hemmatian
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Magnetorheological elastomer Pre-strain Compression mode Dynamic characteristics Phenomenological model Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/6ac122b7c28d4e36bfb6f03633189a9d
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spelling	oai:doaj.org-article:6ac122b7c28d4e36bfb6f03633189a9d2021-11-24T04:23:51ZEffect of pre-strain on compression mode properties of magnetorheological elastomers0142-941810.1016/j.polymertesting.2020.106888https://doaj.org/article/6ac122b7c28d4e36bfb6f03633189a9d2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820321176https://doaj.org/toc/0142-9418The effects of pre-strain on compression mode dynamic characteristics of both isotropic and aligned magnetorheological elastomers (MREs) are experimentally investigated considering wide ranges of particle volume fraction (15%, 30%, and 45%), frequency (1–30 Hz), and magnetic flux density (0–750 mT) under different levels of pre-strain (6%, 11%, and 21%). Results exhibited strong dependence of MRE behavior on the pre-strain, which was further coupled with the effects of the particle volume fraction and frequency, and the magnetic field. The elastic and loss moduli of isotropic MREs consistently increased in a nonlinear manner, when pre-strain increased from 6% to 21%, suggesting pre-strain stiffening and pre-strain dampening effects, respectively, while aligned MRE showed dissimilar trends depending on particle volume fraction. Results revealed higher pre-strain effects for isotropic MREs than aligned MREs. The relative MR effect in view of elastic modulus (MRE′) for both types of MREs consistently decreased with increasing pre-strain, while in view of loss factor (MRη) showed the same trend only for aligned MRE. MRη of isotropic MRE generally showed maximum around 11% pre-strain. Results further revealed maximum MRE′, up to 286%, 973% and 2258% for the isotropic MRE, respectively, with volume fraction of 15%, 30% and 45%, and obtained as 320%, 293%, and 386% for aligned MRE. Simple phenomenological models were subsequently proposed to predict the compressive moduli as well as stress-strain hysteresis characteristics of both types of MREs. A reasonably good agreement was observed between the models’ results and the experiment data for the ranges of pre-strain, volume fraction, frequency, and magnetic flux density considered. The developed models can be effectively employed for the development and design of controllable MRE-based adaptive devices operating in compression mode.Hossein VatandoostRamin SedaghatiSubhash RakhejaMasoud HemmatianElsevierarticleMagnetorheological elastomerPre-strainCompression modeDynamic characteristicsPhenomenological modelPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106888- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Magnetorheological elastomer Pre-strain Compression mode Dynamic characteristics Phenomenological model Polymers and polymer manufacture TP1080-1185
spellingShingle	Magnetorheological elastomer Pre-strain Compression mode Dynamic characteristics Phenomenological model Polymers and polymer manufacture TP1080-1185 Hossein Vatandoost Ramin Sedaghati Subhash Rakheja Masoud Hemmatian Effect of pre-strain on compression mode properties of magnetorheological elastomers
description	The effects of pre-strain on compression mode dynamic characteristics of both isotropic and aligned magnetorheological elastomers (MREs) are experimentally investigated considering wide ranges of particle volume fraction (15%, 30%, and 45%), frequency (1–30 Hz), and magnetic flux density (0–750 mT) under different levels of pre-strain (6%, 11%, and 21%). Results exhibited strong dependence of MRE behavior on the pre-strain, which was further coupled with the effects of the particle volume fraction and frequency, and the magnetic field. The elastic and loss moduli of isotropic MREs consistently increased in a nonlinear manner, when pre-strain increased from 6% to 21%, suggesting pre-strain stiffening and pre-strain dampening effects, respectively, while aligned MRE showed dissimilar trends depending on particle volume fraction. Results revealed higher pre-strain effects for isotropic MREs than aligned MREs. The relative MR effect in view of elastic modulus (MRE′) for both types of MREs consistently decreased with increasing pre-strain, while in view of loss factor (MRη) showed the same trend only for aligned MRE. MRη of isotropic MRE generally showed maximum around 11% pre-strain. Results further revealed maximum MRE′, up to 286%, 973% and 2258% for the isotropic MRE, respectively, with volume fraction of 15%, 30% and 45%, and obtained as 320%, 293%, and 386% for aligned MRE. Simple phenomenological models were subsequently proposed to predict the compressive moduli as well as stress-strain hysteresis characteristics of both types of MREs. A reasonably good agreement was observed between the models’ results and the experiment data for the ranges of pre-strain, volume fraction, frequency, and magnetic flux density considered. The developed models can be effectively employed for the development and design of controllable MRE-based adaptive devices operating in compression mode.
format	article
author	Hossein Vatandoost Ramin Sedaghati Subhash Rakheja Masoud Hemmatian
author_facet	Hossein Vatandoost Ramin Sedaghati Subhash Rakheja Masoud Hemmatian
author_sort	Hossein Vatandoost
title	Effect of pre-strain on compression mode properties of magnetorheological elastomers
title_short	Effect of pre-strain on compression mode properties of magnetorheological elastomers
title_full	Effect of pre-strain on compression mode properties of magnetorheological elastomers
title_fullStr	Effect of pre-strain on compression mode properties of magnetorheological elastomers
title_full_unstemmed	Effect of pre-strain on compression mode properties of magnetorheological elastomers
title_sort	effect of pre-strain on compression mode properties of magnetorheological elastomers
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6ac122b7c28d4e36bfb6f03633189a9d
work_keys_str_mv	AT hosseinvatandoost effectofprestrainoncompressionmodepropertiesofmagnetorheologicalelastomers AT raminsedaghati effectofprestrainoncompressionmodepropertiesofmagnetorheologicalelastomers AT subhashrakheja effectofprestrainoncompressionmodepropertiesofmagnetorheologicalelastomers AT masoudhemmatian effectofprestrainoncompressionmodepropertiesofmagnetorheologicalelastomers
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Effect of pre-strain on compression mode properties of magnetorheological elastomers

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