Dynamic performance of dielectric elastomers utilized as acoustic actuators

Hochradel, K., Rupitsch, S.J., Sutor, A., Lerch, R., Vu, D.K. and Steinmann, P. (2012) Dynamic performance of dielectric elastomers utilized as acoustic actuators. Applied Physics A: Materials Science and Processing, 107(3), pp. 531-538. (doi: 10.1007/s00339-012-6837-2)

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Abstract

We report on the frequency dependent behavior of dielectric elastomer actuators (DEA). The introduced smart material actuators consist of 3M™'s elastomer VHB™4905 (9469) and a compliant, sputtered copper electrode on each side. The presented experiments on these compounds contain the active tuning of their resonance frequency and their application as acoustic actuators.We are able to decrease the membranes' eigenfrequency by 30% with an electrical offset potential. Alternatively, if an alternating signal is applied, sound pressure levels up to 130 dB in an enclosed volume of 28 ccm are achieved. In order to verify the results, a numerical simulation is introduced incorporating the two physical fields involved: electrical and mechanical.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Steinmann, Professor Paul
Authors: Hochradel, K., Rupitsch, S.J., Sutor, A., Lerch, R., Vu, D.K., and Steinmann, P.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Applied Physics A: Materials Science and Processing
Publisher:Springer
ISSN:0947-8396
ISSN (Online):1432-0630
Published Online:25 February 2012
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