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8 Sep 2008

Volume 93, Issue 10, Articles (10xxxx)

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Appl. Phys. Lett. 93, 101905 (2008); http://dx.doi.org/10.1063/1.2977760 (3 pages)

Mei Wang, Yinwei Li, Tian Cui, Yanming Ma, and Guangtian Zou
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Comment on “Method to analyze electromechanical stability of dielectric elastomers”[ Appl. Phys. Lett. 91, 061921 (2007) ]

Yanju Liu, Liwu Liu, Zhen Zhang, Liang Shi, and Jinsong Leng

Appl. Phys. Lett. 93, 106101 (2008); http://dx.doi.org/10.1063/1.2979236 (2 pages) | Cited 20 times

Online Publication Date: 11 September 2008

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We would like to thank Zhao and Suo [ Appl. Phys. Lett. 91, 061921 (2007) ] for their insights and help on “Method to analyze electromechanical stability of dielectric elastomers;” Suo provided the theory of stability of dielectric elastomers. In this Comment, the nonlinear electromechanical theory for deformable dielectrics described in Suo’s paper is applied to analyze the stability of dielectric elastomers. Different from that given in Suo’s paper, in the current work, elastic strain energy functional with two material constants is used for the stability analysis. Dielectric materials with different values of k are analyzed, and the results seem to support Suo’s theory. These results can be applied in the design of dielectric elastomer actuator and in larger application spectrum.
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77.65.-j Piezoelectricity and electromechanical effects
77.84.Jd Polymers; organic compounds
77.22.Ch Permittivity (dielectric function)
81.40.Jj Elasticity and anelasticity, stress-strain relations
62.20.D- Elasticity
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