Tuning sound with soft dielectrics

Eliana Bortot, Gal Shmuel

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

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.

اللغة الأصليةالإنجليزيّة
رقم المقال045028
دوريةSmart Materials and Structures
مستوى الصوت26
رقم الإصدار4
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 14 مارس 2017

All Science Journal Classification (ASJC) codes

  • !!Condensed Matter Physics
  • !!Mechanics of Materials
  • !!Signal Processing
  • !!Atomic and Molecular Physics, and Optics
  • !!Electrical and Electronic Engineering
  • !!General Materials Science
  • !!Civil and Structural Engineering

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