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A non-affine electro-viscoelastic microsphere model for dielectric elastomers: Application to VHB 4910 based actuators

Thylander, Sara LU ; Menzel, Andreas LU and Ristinmaa, Matti LU (2016) In Journal of Intelligent Material Systems and Structures
Abstract
Dielectric elastomers belong to a larger group of materials, the so-called electroactive polymers, which have the capability of transforming electric energy to mechanical energy through deformation. VHB 4910 is one of the most popular
materials for applications of dielectric elastomers and therefore one of the most investigated. This paper includes a new micromechanically motivated constitutive model for dielectric elastomers that incorporates the nearly incompressible and viscous time-dependent behaviour often found in this type of material. A non-affine microsphere framework is used to transform the microscopic constitutive model to a macroscopic continuum counterpart. Furthermore the model is calibrated, through both homogeneous... (More)
Dielectric elastomers belong to a larger group of materials, the so-called electroactive polymers, which have the capability of transforming electric energy to mechanical energy through deformation. VHB 4910 is one of the most popular
materials for applications of dielectric elastomers and therefore one of the most investigated. This paper includes a new micromechanically motivated constitutive model for dielectric elastomers that incorporates the nearly incompressible and viscous time-dependent behaviour often found in this type of material. A non-affine microsphere framework is used to transform the microscopic constitutive model to a macroscopic continuum counterpart. Furthermore the model is calibrated, through both homogeneous deformation examples and more complex finite element analysis, to VHB 4910. The model is able to capture both the purely elastic, the viscoelastic and the electro-viscoelastic properties of the elastomer and demonstrates the power and applicability of the electromechanically coupled microsphere framework. (Less)
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Contribution to journal
publication status
published
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Journal of Intelligent Material Systems and Structures
publisher
SAGE Publications
ISSN
1045-389X
DOI
10.1177/1045389X16651157
language
English
LU publication?
yes
id
ed78faec-a477-4480-a615-d44dc878a93e
date added to LUP
2016-09-22 15:19:54
date last changed
2016-09-26 11:24:47
@misc{ed78faec-a477-4480-a615-d44dc878a93e,
  abstract     = {Dielectric elastomers belong to a larger group of materials, the so-called electroactive polymers, which have the capability of transforming electric energy to mechanical energy through deformation. VHB 4910 is one of the most popular<br/>materials for applications of dielectric elastomers and therefore one of the most investigated. This paper includes a new micromechanically motivated constitutive model for dielectric elastomers that incorporates the nearly incompressible and viscous time-dependent behaviour often found in this type of material. A non-affine microsphere framework is used to transform the microscopic constitutive model to a macroscopic continuum counterpart. Furthermore the model is calibrated, through both homogeneous deformation examples and more complex finite element analysis, to VHB 4910. The model is able to capture both the purely elastic, the viscoelastic and the electro-viscoelastic properties of the elastomer and demonstrates the power and applicability of the electromechanically coupled microsphere framework.},
  author       = {Thylander, Sara and Menzel, Andreas and Ristinmaa, Matti},
  issn         = {1045-389X},
  language     = {eng},
  publisher    = {ARRAY(0xa16dc18)},
  series       = {Journal of Intelligent Material Systems and Structures},
  title        = {A non-affine electro-viscoelastic microsphere model for dielectric elastomers: Application to VHB 4910 based actuators},
  url          = {http://dx.doi.org/10.1177/1045389X16651157},
  year         = {2016},
}