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

  • bending
  • modelling
  • Piezoelectric actuator
  • adhesive layer

• Graduation date

  Fall 2019

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/r3-rbqp-mv86

• License

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