Abstract
Dielectric elastomers are soft materials that can be deformed greatly by an applied voltage, generating large strains. Thus they are useful in actuators for a variety of applications, perhaps most intriguingly as artificial muscles. However, their nonlinear electromechanical response exhibits instabilities that must be understood for proper engineering. Using the method of virtual work, the authors deduce a dynamical model to explore the snap-through instability of dielectric elastomers with different limiting stretches. By varying the tensile force, this instability can be tuned.
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