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Novel design of interdigitated electrodes for piezoelectric transducers

  • Jemai, Ahmed (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School) ;
  • Najar, Fehmi (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School)
  • Received : 2018.07.12
  • Accepted : 2018.09.11
  • Published : 2018.10.25
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Abstract

Novel design of interdigitated electrodes capable of increasing the performance of piezoelectric transducers are proposed. The new electrodes' geometry improve the electromechanical coupling by offering an enhanced adaptation of the electric field to the interdigitated electrode configuration. The proposed analysis is based on finite element modeling and takes into account local polarization effect. It is shown that the proposed electrodes considerably increase the strain generation compared to flat electrode arrangement used for Macro Fiber Composite (MFC) and Active Fiber Composite (AFC) actuators. Also, electric field singularities are reduced allowing better reliability of the transducer against electric failure.

Keywords

References

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