TITLE

Electromechanical stability of dielectric elastomer

AUTHOR(S)
Jinsong Leng; Liwu Liu; Yanju Liu; Kai Yu; Shouhua Sun
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/25/2009, Vol. 94 Issue 21, p211901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electromechanical instability may occur in dielectric elastomer films due to the coupling between mechanical forces and electric fields. According to Zhao and Suo [Appl. Phys. Lett. 91, 061921 (2007)], free-energy in any form, which consists of elastic strain energy and electric energy, can be used to analyze the electromechanical stability of dielectric elastomer. By taking the permittivity as a variable depending on the deformation in a free energy function, a relationship is established among critical nominal electric field, critical real electric field, nominal stress, and principal stretch ratios. The accurate expressions of these parameters are presented for a special equal biaxial stretch case. All the results obtained by utilizing the single material constant neo-Hookean elastic strain energy model coincide with the conclusions by Zhao and Suo.
ACCESSION #
40637753

 

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