Title of article :
Giant voltage-induced deformation in dielectric elastomers near the verge of snap-through instability
Author/Authors :
Li، نويسنده , , Tiefeng and Keplinger، نويسنده , , Christoph and Baumgartner، نويسنده , , Richard L. Bauer، نويسنده , , Siegfried and Yang، نويسنده , , Wei and Suo، نويسنده , , Zhigang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
18
From page :
611
To page :
628
Abstract :
Dielectric elastomers are capable of large voltage-induced deformation, but achieving such large deformation in practice has been a major challenge due to electromechanical instability and electric breakdown. The complex nonlinear behavior suggests an important opportunity: electromechanical instability can be harnessed to achieve giant voltage-induced deformation. We introduce the following principle of operation: place a dielectric elastomer near the verge of snap-through instability, trigger the instability with voltage, and bend the snap-through path to avert electric breakdown. We demonstrate this principle of operation with a commonly used experimental setup—a dielectric membrane mounted on a chamber of air. The behavior of the membrane can be changed dramatically by varying parameters such as the initial pressure in the chamber, the volume of the chamber, and the prestretch of the membrane. We use a computational model to analyze inhomogeneous deformation and map out bifurcation diagrams to guide the experiment. With suitable values of the parameters, we obtain giant voltage-induced expansion of area by 1692%, far beyond the largest value reported in the literature.
Keywords :
Snap-through instability , Dielectric elastomer , Electromechanical processes , Bifurcation , finite strain
Journal title :
Journal of the Mechanics and Physics of Solids
Serial Year :
2013
Journal title :
Journal of the Mechanics and Physics of Solids
Record number :
1428146
Link To Document :
بازگشت