Effect of piezoelectric patch on natural frequencies of Timoshenko beam made of functionally graded material

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Abstract

The present paper addresses developing the Dynamic Stiffness Method (DSM) for natural frequency analysis of functionally graded beam with piezoelectric patch based on the Timoshenko beam theory and power law of material grading. Governing equations and general solution of free vibration are conducted for the beam element with piezoelectric layer that is modelled as a homogeneous Timoshenko beam. The obtained solution allows establishing dynamic stiffness matrix for modal analysis of FGM beam with bonded piezoelectric distributed sensors/actuators. Effect of thickness and position of the smart sensors/actuators and material parameters on natural frequencies is studied with the aim for dynamic testing and health monitoring of FGM structures. The theoretical developments are validated and illustrated by numerical examples.

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Khiem, N. T., Hai, T. T., & Huong, L. Q. (2020). Effect of piezoelectric patch on natural frequencies of Timoshenko beam made of functionally graded material. Materials Research Express, 7(5). https://doi.org/10.1088/2053-1591/ab8df5

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