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RESEARCH PAPERS

Piezothermoelasticity and Precision Control of Piezoelectric Systems: Theory and Finite Element Analysis

[+] Author and Article Information
H. S. Tzou, R. Ye

Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0046

J. Vib. Acoust 116(4), 489-495 (Oct 01, 1994) (7 pages) doi:10.1115/1.2930454 History: Received July 01, 1992; Revised September 01, 1993; Online June 17, 2008

Abstract

Piezothermoelastic effects of distributed piezoelectric sensor/actuator and structural systems are studied. Distributed controls (static and dynamic) of piezoelectric laminates subjected to a steady-state temperature field are investigated. Piezothermoelastic constitutive equations are defined, followed by three energy functionals for the displacement, electric, and temperature fields, respectively. A new 3-D piezothermoelastic thin hexahedron finite element with three internal degrees of freedom is formulated using a variational formulation which includes thermal, electric, and mechanical energies. A system equation for the piezoelectric continuum exposed to combined displacement, electric, and temperature fields is formulated. Distributed sensing and control equations of piezoelectric laminates in a temperature field are derived. Thermal influences on the sensing and control of piezoelectric PZT/steel laminates are investigated in case studies.

Copyright © 1994 by The American Society of Mechanical Engineers
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