Electromechanical behaviour of piezoelectric actuators with partially debonded adhesive layers

  • Author / Creator
    Hu, Huan
  • The electromechanical behaviour of piezoelectric actuators and the adhesive layer, which connects the actuator and the host structure can have effect on the performance of smart piezoelectric structures. In this study, a newly thin-sheet piezoelectric actuator model with an adhesive layer, which undergoes bending deformation, is proposed. This thesis is to present a comprehensive theoretical study of the effects of material mismatch and geometry parameters of the piezoelectric actuator model upon the coupled electromechanical characteristics of piezoelectric actuator systems. The emphasis of the current study is on the load transfer, local stress field, axial force and bending moment near the imperfectly bonded actuators. Theoretical electromechanical solutions to the interfacial stresses based on the integral governing equations are provided using Chebyshev polynomial expansion. Detailed numerical simulations are conducted to evaluate the effects of the geometry and the material mismatch of the piezoelectric actuator and adhesive layer upon the actuating process. The effects of the interfacial debonding are also presented and discussed. The results indicate that the geometry and material properties of the actuator system affect the stress distribution, load transfer, axial force and bending moment significantly, and the corresponding effects have been discussed and analyzed in detail. This study could provide some new insights into the design of piezoelectric actuator system.

  • Subjects / Keywords
  • Graduation date
    Fall 2019
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.