Tunable band gaps and transmission behavior of SH waves with oblique incident angle in periodic dielectric elastomer laminates

This work focuses on understanding elastic wave propagation in the periodic dielectric elastomer (DE) laminates with geometry and material properties that can be tuned by an external electric field. In particular, shear horizontal (SH) wave propagation at oblique incidence is investigated using the Dorfmann and Ogden's finite electroelasticity theory and the Dielectric Gent (DG) energy model. Numerical calculations of the dispersion relations and transmission properties are presented. The numerical results show that the SH wave band gaps and transmission coefficient depend on various parameters that can be controlled by the applied external electrostatic field and the incident angle of the SH wave, thus providing a novel strategy for designing flexible phononic structures with tunable properties.