Electromechanical impedance modeling of PZT transducers for health monitoring of cylindrical shell structures

Yaowen Yang, Yuhang Hu

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents an electromechanical impedance (EMI) model for health monitoring of cylindrical shell structures. By investigating the interaction between the piezoceramic (PZT) transducers and a typical cylindrical shell structure, the EMI of the PZT transducers is obtained. In this study, a generic two-dimensional impedance modeling approach is adopted to obtain the admittance (inverse of impedance) of the PZT transducers. The p-Ritz method, due to its effectiveness and common utility for various boundary conditions, is employed to calculate the mechanical impedance of the cylindrical shell structure. An experimental test is carried out on an aluminum cylindrical shell specimen and the PZT admittance signatures are measured by an impedance analyzer. The experimental results are compared with the theoretical ones to verify the developed EMI model for the PZT-shell system under undamaged and damaged conditions. The feasibility of the EMI method for damage detection of cylindrical shell structures is also discussed.

Original languageEnglish (US)
Article number015005
JournalSmart Materials and Structures
Volume17
Issue number1
DOIs
StatePublished - Feb 1 2008

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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