Paper Title:
Tunable Membrane for Electromagnetic Devices Using Dielectric Elastomers
  Abstract

The amplitudes of miniaturized electromagnetic actuators are clearly enhanced if the eigenfrequencies of the membrane are used for actuation. However, the bandwidth for such operation is very limited. This can be overcome to some extent by the employment of membranes with electrically tunable stiffness. In this context we investigated membranes of dielectric elastomer materials and present experimental results on the ability to change their pre-strain to shift the eigenmodes to lower frequencies upon activation. Furthermore, the viscoelastic properties of an acrylic and a silicone membrane are investigated and compared to dynamic experiments. The parameters for the stiffness and viscoelasticity are derived from the experimental creep data and incorporated in a hyperelastic material model. Using this adapted stress-strain relationship the membrane behavior over time can be evaluated for different loading as well as pre-strain conditions.

  Info
Periodical
Edited by
Pietro VINCENZINI, Yoseph BAR-COHEN and Federico CARPI
Pages
141-146
DOI
10.4028/www.scientific.net/AST.61.141
Citation
C. Bolzmacher, K. Bauer, U. Schmid, H. Seidel, M. Hafez, "Tunable Membrane for Electromagnetic Devices Using Dielectric Elastomers", Advances in Science and Technology, Vol. 61, pp. 141-146, 2008
Online since
September 2008
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Price
$32.00
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