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Korosh Khorshidi

Korosh Khorshidi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-7321-972X
Education: PhD.
ScopusId: 23970920600
HIndex:
Faculty: Engineering
Address: Arak University
Phone: 086-32625720

Research

Title
Analytical approach to energy harvesting of functionally graded higher-order beams with proof mass
Type
JournalPaper
Keywords
energy harvesting، functionally graded، higher-order beams، proof mass
Year
2022
Journal Acta Mechanica
DOI
Researchers Korosh Khorshidi ، Mehdi Rezaeisaray ، mehdi karimi

Abstract

An analytical model is developed based on modified shear deformation theory to study energy harvesting using a piezoelectric layer deposited on functionally graded (FG) beams. The mechanical properties of the beam vary according to the power law in the beam thickness direction. Different shear deformable beam theories including trigonometric, exponential, hyperbolic, and fifth-order shear deformation theory are modelled that can encounter rotary inertia impacts. The harvester is excited at its base, and the response is expressed in the form of translation and rotation. A concentrated mass is applied at the free end of the beam. Two different damping types, Kelvin-Voigt damping and air damping, are assumed separately. The coupled electro-mechanical governing equations of the FG harvester are derived using Hamilton’s principle, and then discretized using the Galerkin approach and diagonalization method to find the electrical characteristics of the harvester. At the end, the effect of geometrical parameters, FG index, and concentrated mass on the extracted voltage and power is evaluated in detail. Furthermore, the size and location of the piezoelectric layer to optimize the electrical output is studied.