Variation of material properties of piezoelectric ceramics due to mechanical loading and evaluation of internal damage

Mamoru Mizuno, Nozomi Odagiri, Mitsuhiro Okayasu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the present paper, lead zirconate titanate (PZT) piezoelectric ceramics were subjected to compressive mechanical loading, and static and fatigue fracture tests were performed. Each test was interrupted systematically after applying prescribed loading, and resonance and anti-resonance frequencies and an electrostatic capacity were measured by means of an impedance analyzer. Then an electromechanical coupling coefficient, a dielectric constant, an elastic coefficient and a piezoelectric constant as material properties of piezoelectric ceramics were evaluated from them. The variation of the material properties due to static and cyclic compressive loading was investigated experimentally. Further, since internal damage of materials affects their material properities, the damage was evaluated reversely from the variation of the elastic coefficient in the present paper. Then the development of internal damage due to mechanical loading was clarified on the basis of the continuum damage mechanics. From SEM micrograph of the fracture surface, it was found that the damage was microscopic cracks in the direction of compressive loading.

Original languageEnglish
Pages (from-to)467-472
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume74
Issue number3
DOIs
Publication statusPublished - Mar 2008
Externally publishedYes

Keywords

  • Continuume damage mechanics
  • Fatigue
  • Internal damage
  • Material properties
  • Mechanical loading
  • Piezoelectric ceramics
  • Resonance frequency

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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