Dynamic Electromechanical Response of a Viscoelastic Dielectric Elastomer under Cycle Electric Loads

Figure 9

The total stretches , the viscous stretches ((a), (d), and (g)), the phase diagrams ((c), (e), and (h)), and the Poincaré maps ((c), (f), and (i)) at dimensionless frequency of for different dimensionless relaxation times , 10, and 100.