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The dielectric breakdown limit of silicone dielectric elastomer actuators

Gatti, Davide ; Haus, Henry ; Matysek, Marc ; Frohnapfel, Bettina ; Tropea, Cameron ; Schlaak, Helmut F. (2014)
The dielectric breakdown limit of silicone dielectric elastomer actuators.
In: Applied Physics Letters, 104 (5)
Article, Bibliographie

Abstract

Soft silicone elastomers are used in a generation of dielectric elastomer actuators (DEAs) with improved actuation speed and durability compared to the commonly used, highly viscoelastic polyacrylate 3M VHB films. The maximum voltage-induced stretch of DEAs is ultimately limited by their dielectric breakdown field strength. We measure the dependence of dielectric breakdown field strength on thickness and stretch for a silicone elastomer, when voltage-induced deformation is prevented. The experimental results are combined with an analytic model of equi-biaxial actuation to show that accounting for variable dielectric field strength results in different values of optimal pre-stretch and thickness that maximize the DEA actuation.

Item Type: Article
Erschienen: 2014
Creators: Gatti, Davide ; Haus, Henry ; Matysek, Marc ; Frohnapfel, Bettina ; Tropea, Cameron ; Schlaak, Helmut F.
Type of entry: Bibliographie
Title: The dielectric breakdown limit of silicone dielectric elastomer actuators
Language: German
Date: 3 February 2014
Publisher: AIP Publishing LLC
Journal or Publication Title: Applied Physics Letters
Volume of the journal: 104
Issue Number: 5
URL / URN: http://dx.doi.org/10.1063/1.4863816
Abstract:

Soft silicone elastomers are used in a generation of dielectric elastomer actuators (DEAs) with improved actuation speed and durability compared to the commonly used, highly viscoelastic polyacrylate 3M VHB films. The maximum voltage-induced stretch of DEAs is ultimately limited by their dielectric breakdown field strength. We measure the dependence of dielectric breakdown field strength on thickness and stretch for a silicone elastomer, when voltage-induced deformation is prevented. The experimental results are combined with an analytic model of equi-biaxial actuation to show that accounting for variable dielectric field strength results in different values of optimal pre-stretch and thickness that maximize the DEA actuation.

Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design (dissolved 18.12.2018)
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Date Deposited: 27 Jul 2015 11:52
Last Modified: 04 Mar 2019 09:53
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