Title: A study on thermodynamic potential energy for magnetostrictive systems

Authors: Mehmet Sunar, Jamil M. Bakhashwain

Addresses: Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia. ' Electrical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

Abstract: The coupled modelling of mechanical, electrical, thermal and magnetic fields are studied in a thermo-magneto-electric medium through a thermodynamic potential. Hamilton|s principle is used to obtain the dynamic equations of motion that can be used for examining the behaviour of piezoelectric and magnetostrictive sensors and actuators. The thermodynamic potential energy is a key element in the equations and hence its various constituents are derived via the finite element method. Case studies include magnetoelectric and magnetostrictive systems subjected to various types of inputs. The response and thermodynamic potential energy of these systems are computed and plotted.

Keywords: cantilever beam; magnetic fields; magnetostriction; piezoelectric sensors; thermal effects; thermodynamic potential energy; piezoelectric actuators; magnetostrictive sensors; magnetostrictive actuators; finite element method; FEM.

DOI: 10.1504/IJEX.2005.007249

International Journal of Exergy, 2005 Vol.2 No.3, pp.246 - 259

Published online: 27 Jun 2005 *

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