A maximum strain criterion for electric-field-induced fatigue crack propagation in ferroelectric ceramics

Jian Ku Shang, Xiaoli Tan

Research output: Contribution to journalArticlepeer-review

Abstract

Crack growth behavior in ferroelectric ceramics was examined under purely electrical and purely mechanical loading conditions. While cracks grew under mechanical loading along the plane of the maximum tensile stress, crack growth under electrical loading tended to be intergranular and the direction of the crack growth was found to vary greatly with geometric arrangements of applied electric field, remnant polarization and crack orientation. When both the applied field and remnant polarization were perpendicular to the crack plane, the crack propagated straight ahead on the original plane. However, for other electrical configurations, cracks were driven to propagate on the planes inclined up to 90° from the original crack plane. Analysis of the electromechanical conditions in the specimens indicated that the crack preferred to propagate on the plane of the maximum principal strain, thus satisfying a maximum strain criterion.

Original languageEnglish (US)
Pages (from-to)131-139
Number of pages9
JournalMaterials Science and Engineering A
Volume301
Issue number2
DOIs
StatePublished - 2001

Keywords

  • Crack growth
  • Electric field
  • Ferroelectric cera mics
  • Piezoelectric

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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