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Numerical Modeling Aspects of Dielectric Elastomer Actuators

Müller, Ralf and Klassen, Markus and Xu, Bai-Xiang (2012):
Numerical Modeling Aspects of Dielectric Elastomer Actuators.
In: Proc. Appl. Math. Mech., Wiley-VCH Verlag GmbH & Co. KGaA, pp. 409-410, 12, (1), ISSN 16177061,
[Online-Edition: http://dx.doi.org/10.1002/pamm.201210193],
[Article]

Abstract

In modern actuator technology dielectric elastomers are considered as new materials to realize smart actuators which are known as dielectric elastomer actuators (DEAs). In comparison to piezoceramics actuators, DEAs offer the possibility to achieve large deformations with low actuation forces. This property motivates the implementation as artificial muscles since the deformation-force behavior is similar. Other application fields are pumps, deformable surfaces in aerospace, robotics and haptic feedback.

The present work introduces the fundamental concepts to describe the electromechanical coupling in the concept of continuum mechanics for finite deformations.

As a benchmark a 3D sandwich actuator setup is taken into account to analyze the mechanical compression stability of the elastomer structure, see [1, 2]. This structure is also considered to study the influence of inhomogeneities in the deformation behavior. For this purpose piezoceramic and air inclusions are considered in the finite element mesh.

As a last numerical example an elastomer tube with three pairs of electrodes is simulated numerically to motivate the use of dielectric elastomers as peristaltic pumps.

Item Type: Article
Erschienen: 2012
Creators: Müller, Ralf and Klassen, Markus and Xu, Bai-Xiang
Title: Numerical Modeling Aspects of Dielectric Elastomer Actuators
Language: English
Abstract:

In modern actuator technology dielectric elastomers are considered as new materials to realize smart actuators which are known as dielectric elastomer actuators (DEAs). In comparison to piezoceramics actuators, DEAs offer the possibility to achieve large deformations with low actuation forces. This property motivates the implementation as artificial muscles since the deformation-force behavior is similar. Other application fields are pumps, deformable surfaces in aerospace, robotics and haptic feedback.

The present work introduces the fundamental concepts to describe the electromechanical coupling in the concept of continuum mechanics for finite deformations.

As a benchmark a 3D sandwich actuator setup is taken into account to analyze the mechanical compression stability of the elastomer structure, see [1, 2]. This structure is also considered to study the influence of inhomogeneities in the deformation behavior. For this purpose piezoceramic and air inclusions are considered in the finite element mesh.

As a last numerical example an elastomer tube with three pairs of electrodes is simulated numerically to motivate the use of dielectric elastomers as peristaltic pumps.

Journal or Publication Title: Proc. Appl. Math. Mech.
Volume: 12
Number: 1
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Mechanics of functional Materials
Zentrale Einrichtungen
Exzellenzinitiative
Exzellenzinitiative > Graduate Schools > Graduate School of Computational Engineering (CE)
Exzellenzinitiative > Graduate Schools
Date Deposited: 18 Apr 2013 07:39
Official URL: http://dx.doi.org/10.1002/pamm.201210193
Identification Number: doi:10.1002/pamm.201210193
Funders: The authors acknowledge the financial support by the Landesforschungszentrum “Center for Mathematical and Computational Modelling”(CM) 2 .
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