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Material Modeling and Microstructural Optimization of Dielectric Elastomer Actuators

Klassen, M. and Xu, Bai-Xiang and Klinkel, S. and Mueller, R. (2012):
Material Modeling and Microstructural Optimization of Dielectric Elastomer Actuators.
In: TECHNISCHE MECHANIK, pp. 38-52, 32, (1), ISSN 0232-3869,
[Article]

Abstract

The modeling and 3D numerical implementation of dielectric elastomer actuators are discussed in this work. The electromechanical coupling for the actuator is realized via the Maxwell stress in the mechanical balance. In this nonlinear numerical problem the consistent tangent matrix, which is used for the Newton iterations, is described in detail. The operational curve of a homogeneous capacitor structure is compared to analytical solutions by implementing the Neo-Hooke and the Yeoh material model in the numerical simulations respectively. In this simulations the instability aspects of this type of structure is discussed. Furthermore the optimization of the operational curve is analyzed for both material models through the consideration of inclusion materials in the elastomer structure. Piezoceramic and a soft material inclusions with a fiber and a spherical geometry are considered. The results show the capability of improving the operational curves of the actuator with these inhomogeneities

Item Type: Article
Erschienen: 2012
Creators: Klassen, M. and Xu, Bai-Xiang and Klinkel, S. and Mueller, R.
Title: Material Modeling and Microstructural Optimization of Dielectric Elastomer Actuators
Language: English
Abstract:

The modeling and 3D numerical implementation of dielectric elastomer actuators are discussed in this work. The electromechanical coupling for the actuator is realized via the Maxwell stress in the mechanical balance. In this nonlinear numerical problem the consistent tangent matrix, which is used for the Newton iterations, is described in detail. The operational curve of a homogeneous capacitor structure is compared to analytical solutions by implementing the Neo-Hooke and the Yeoh material model in the numerical simulations respectively. In this simulations the instability aspects of this type of structure is discussed. Furthermore the optimization of the operational curve is analyzed for both material models through the consideration of inclusion materials in the elastomer structure. Piezoceramic and a soft material inclusions with a fiber and a spherical geometry are considered. The results show the capability of improving the operational curves of the actuator with these inhomogeneities

Journal or Publication Title: TECHNISCHE MECHANIK
Title of Book: Scientific Journal for Fundamentals and Applications of Engineering Mechanics
Series Name: Scientific Journal for Fundamentals and Applications of Engineering Mechanics
Volume: 32
Number: 1
Place of Publication: Magdeburg
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
Event Title: 5th GAMM-Seminar on Multiscale Material Modelling
Event Location: Kaiserslautern
Date Deposited: 18 Apr 2013 08:31
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