Tuning sound with soft dielectrics

Eliana Bortot, Gal Shmuel

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Soft dielectric tubes undergo large deformations when subjected to radial voltage. Using the theory of nonlinear electroelasticity, we investigate how voltage-controlled deformations of these tubes in an array alter acoustic wave propagation through it. We show that the propagation is annihilated across a certain audible frequency range, referred to as a sonic band gap. We carry out a numerical study, to find that the band gap depends nonlinearly on the voltage, owing to geometrical and material nonlinearities. By analyzing different mechanical constraints, we demonstrate that snap-through instabilities resulting from these nonlinearities can be harnessed to achieve sharp transitions in the gap width. Our conclusions hint at a new strategy to adaptively filter sound using a simple control parameter - an applied voltage.

שפה מקוריתאנגלית
מספר המאמר045028
כתב עתSmart Materials and Structures
כרך26
מספר גיליון4
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 14 מרץ 2017

ASJC Scopus subject areas

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  • ???subjectarea.asjc.2200.2211???
  • ???subjectarea.asjc.1700.1711???
  • ???subjectarea.asjc.3100.3107???
  • ???subjectarea.asjc.2200.2208???
  • ???subjectarea.asjc.2500.2500???
  • ???subjectarea.asjc.2200.2205???

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