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• W3164865137 endingPage "114136" @default.
• W3164865137 startingPage "114136" @default.
• W3164865137 abstract "• Theoretical flaws induced by uniform electric field assumption are pointed out. • Non-uniform electric field assumption is proposed. • The bending stiffness term is explicitly corrected. • Static analysis is conducted to validate the non-uniform electric field assumption. • Dynamic analysis is conducted to correct piezoelectric energy harvesters’ performance. In the existing electromechanical model for cantilevered piezoelectric energy harvesters , the electric field in the piezoelectric layer is generally considered as a uniform field. In the present study, it is found and described in detail that the oversimplified uniform electric field assumption could lead to critical issues regarding the fundamental of piezoelectricity. Further, inspired by the electric field distribution obtained using the exact solutions for plane problems, a non-uniform electric field is proposed. Accordingly, an improved distributed parameter electromechanical model for cantilevered piezoelectric energy harvesters including both unimorph and bimorph configurations is established, in which the bending stiffness term involved in the electromechanical governing equations is explicitly corrected, and the aforementioned critical issues are perfectly addressed. The present proposed non-uniform electric field is then validated by comparing the static analysis results of the present model with finite element results and the results obtained using exact solutions for plane problems. Dynamic analysis of the present model is also conducted, and the electromechanical characteristic corrections for the traditional distributed parameter model adopting uniform electric field assumption is carried out including bending stiffness correction, resonant frequency correction, voltage output correction and power output correction." @default.
• W3164865137 created "2021-06-07" @default.
• W3164865137 creator A5064321685 @default.
• W3164865137 creator A5076552126 @default.
• W3164865137 date "2021-09-01" @default.
• W3164865137 modified "2023-09-24" @default.
• W3164865137 title "Non-uniform electric field in cantilevered piezoelectric energy harvesters: An improved distributed parameter electromechanical model" @default.
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• W3164865137 doi "https://doi.org/10.1016/j.compstruct.2021.114136" @default.
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