Voltage-induced buckling and wrinkling in a dielectric elastomer

Abstract eng:
This paper investigates instability and phase transition in a membrane of a dielectric elastomer. It is found that prestretches play a significant role in determining its instability modes. In the absence of prestretches, the membrane buckles without forming local wrinkles. When the applied prestretches are intermediate, the membrane exhibits discontinuous phase transition from the flat to wrinkled states. The flat and wrinkled regions not only coexist, but also keep moving with the respective areas changing (depending on the variation of the charges). When the prestretches are large, the membrane exhibits continuous phase transition, and the membrane forms wrinkles simultaneously throughout the surface.

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