Dielectric elastomer membranes wrinkle stably in charge control for all stretches, but in voltage control wrinkled states lose stability precisely when the tension-extension inequality fails, defining a boundary for pull-in.
Just immediately prior to the onset of compressive stresses at the internal rim, forE = 0.38, convexity of the electroelastic energy is lost at the external rim
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Stable wrinkling in voltage and charge controlled dielectric membranes
Dielectric elastomer membranes wrinkle stably in charge control for all stretches, but in voltage control wrinkled states lose stability precisely when the tension-extension inequality fails, defining a boundary for pull-in.