English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Soft electroactive materials can undergo large deformation subjected toeither mechanical or electrical stimulus, and hence they can be excellentcandidates for designing extremely flexible and adaptive structures anddevices. This paper proposes a simple one-dimensional soft phononic crystalcylinder made of dielectric elastomer to show how large deformation andelectric field can be used jointly to tune the longitudinal waves propagatingin the PC. A series of soft electrodes are placed periodically along thedielectric elastomer cylinder, and hence the material can be regarded asuniform in the undeformed state. This is also the case for the uniformlypre-stretched state induced by a static axial force only. The effectiveperiodicity of the structure is then achieved through two loading paths, i.e.by maintaining the longitudinal stretch and applying an electric voltage overany two neighbouring electrodes, or by holding the axial force and applying thevoltage. All physical field variables for both configurations can be determinedexactly based on the nonlinear theory of electroelasticity. An infinitesimalwave motion is further superimposed on the pre-deformed configurations and thecorresponding dispersion equations are derived analytically by invoking thelinearized theory for incremental motions. Numerical examples are finallyconsidered to show the tunability of wave propagation behavior in the soft PCcylinder. The outstanding performance regarding the band gap (BG) property ofthe proposed soft dielectric PC is clearly demonstrated by comparing with theconventional design adopting the hard piezoelectric material. Note that softdielectric PCs are susceptible to various kinds of failure (buckling,electromechanical instability, electric breakdown, etc.), imposingcorresponding limits on the external stimuli.

Tuning Elastic Waves in Soft Phononic Crystal Cylinders via Large Deformation and Electromechanical Coupling