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Smart Structures and Systems
  Volume 22, Number 4, October 2018 , pages 369-382
DOI: https://doi.org/10.12989/sss.2018.22.4.369
 


Novel design of interdigitated electrodes for piezoelectric transducers
Ahmed Jemai and Fehmi Najar

 
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.
 
Key Words
    interdigitated electrodes; piezoelectricity; sensor and actuator; polarization; piezocomposite
 
Address
Ahmed Jemai:Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, BP 743, La Marsa 2078, University of Carthage, Tunisia
Fehmi Najar: Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, BP 743, La Marsa 2078, University of Carthage, Tunisia;
IPEIEM, B.P 244, Tunis 2092, University of Tunis El Manar, Tunisia
 

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