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A polarisation based approach to model strain dependent electrostatic pressure of dielectric elastomer actuators
Author(s) -
Schlögl Tristan,
Leyendecker Sigrid
Publication year - 2017
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201710248
Subject(s) - dielectric , permittivity , relative permittivity , constant (computer programming) , elastomer , materials science , work (physics) , actuator , electrostatics , mechanics , composite material , thermodynamics , physics , electrical engineering , computer science , engineering , optoelectronics , quantum mechanics , programming language
Abstract A wide‐spread lumped parameter model describing the electrostatic pressure is presented by Pelrine et. al. in 1998 [1]. In Pelrine's model, the electrostatic pressure is affected by the relative permittivity of the material, also known as dielectric constant. However, many researchers found that the dielectric constant of DEAs is not constant at all, but decreasing with increasing pre‐stretch of the material. In this work, an alternative modelling approach is presented, explaining the stretch dependent actuation pressure. It is shown that this new model fits experimental data found in literature quite well. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)