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Electro-viscoelastic response of an acrylic elastomer analysed by digital image correlation

Thylander, Sara LU ; Menzel, Andreas LU ; Ristinmaa, Matti LU ; Hall, Stephen LU and Engqvist, Jonas LU (2017) In Smart Materials and Structures 26(8).
Abstract
Experimental investigations are presented with respect to the electromechanically coupled and time-dependent behaviour of an acrylic elastomer, VHB 4910. For the electromechanically coupled experiments different biaxial pre-stretches have been considered and full-field measurements were made using three-dimensional surface digital image correlation. Both equi- biaxial and non equi-biaxial pre-stretches as well as both circular and non-circular electrodes are investigated. The experimental data provide new insights into the complex material behaviour of VHB 4910 and will enable enhanced calibration and development of constitutive models. Special emphasis lies on the quantification of out-of-plane deformation, i.e. the thickness change, of... (More)
Experimental investigations are presented with respect to the electromechanically coupled and time-dependent behaviour of an acrylic elastomer, VHB 4910. For the electromechanically coupled experiments different biaxial pre-stretches have been considered and full-field measurements were made using three-dimensional surface digital image correlation. Both equi- biaxial and non equi-biaxial pre-stretches as well as both circular and non-circular electrodes are investigated. The experimental data provide new insights into the complex material behaviour of VHB 4910 and will enable enhanced calibration and development of constitutive models. Special emphasis lies on the quantification of out-of-plane deformation, i.e. the thickness change, of biaxially pre-stretched specimens based on an assumption of material incompressibility. The level of pre-stretch and thickness of the membrane plays a critical role in view of electromechanical instabilities. For completeness, cyclic uniaxial tests of the purely mechanical response are also presented and compared to similar experiments found in the literature. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electroactive polymer, electro-viscoelasticity, VHB 4910, digital image correlation
in
Smart Materials and Structures
volume
26
issue
8
pages
16 pages
publisher
IOP Publishing
ISSN
0964-1726
DOI
10.1088/1361-665X/aa7255
language
English
LU publication?
yes
id
f3f54d23-917c-4a25-a27c-dd4907628269
date added to LUP
2018-01-24 12:27:24
date last changed
2018-11-21 21:37:34
@article{f3f54d23-917c-4a25-a27c-dd4907628269,
  abstract     = {Experimental investigations are presented with respect to the electromechanically coupled and time-dependent behaviour of an acrylic elastomer, VHB 4910. For the electromechanically coupled experiments different biaxial pre-stretches have been considered and full-field measurements were made using three-dimensional surface digital image correlation. Both equi- biaxial and non equi-biaxial pre-stretches as well as both circular and non-circular electrodes are investigated. The experimental data provide new insights into the complex material behaviour of VHB 4910 and will enable enhanced calibration and development of constitutive models. Special emphasis lies on the quantification of out-of-plane deformation, i.e. the thickness change, of biaxially pre-stretched specimens based on an assumption of material incompressibility. The level of pre-stretch and thickness of the membrane plays a critical role in view of electromechanical instabilities. For completeness, cyclic uniaxial tests of the purely mechanical response are also presented and compared to similar experiments found in the literature. },
  author       = {Thylander, Sara and Menzel, Andreas and Ristinmaa, Matti and Hall, Stephen and Engqvist, Jonas},
  issn         = {0964-1726},
  keyword      = {electroactive polymer,electro-viscoelasticity,VHB 4910,digital image correlation},
  language     = {eng},
  month        = {07},
  number       = {8},
  pages        = {16},
  publisher    = {IOP Publishing},
  series       = {Smart Materials and Structures},
  title        = {Electro-viscoelastic response of an acrylic elastomer analysed by digital image correlation},
  url          = {http://dx.doi.org/10.1088/1361-665X/aa7255},
  volume       = {26},
  year         = {2017},
}