Single-edge precracked beam test and electric fracture mechanics analysis for piezoelectric ceramics

Y. Shindo, K. Horiguchi, H. Murakami, Fumio Narita

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

The electric fracture behavior of a piezoelectric ceramic under applied electric fields has been discussed through experimental and theoretical characterizations. The single-edge precracked beam tests were performed on a commercial lead zirconate titanate ceramic. Mechanical loading was applied by the crosshead displacement control of the screw-driven electromechanical test machine. The fracture initiation loads under different electric fields are obtained from the experiment. It is shown that the crack opens less under a positive electric field (electric field in poling direction) than under a negative electric field. A finite element analysis was also employed to calculate the energy release rate and stress intensity factor, and to study the validity of the electrical boundary conditions at the crack surfaces to be permeable in piezoelectric materials. An expression is presented for determining the fracture properties due to electrical effects by experimental and theoretical means. For a given displacement, the energy release rate is lower for positive electric fields and higher for negative electric fields. This is in agreement with the experimental findings. The numerical results under an applied force are in contrast to those under a constant displacement, and consistent with the relevant experimental results.

Original languageEnglish
Pages (from-to)311-320
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4235
DOIs
Publication statusPublished - 2001 Jan 1
EventSmart Structures and Devices - Melbourne, VIC, Australia
Duration: 2000 Dec 132000 Dec 15

Keywords

  • Energy Release Rate
  • Finite Element Method
  • Fracture Mechanics
  • Fracture Toughness
  • Piezoelectric Material
  • Single-Edge Precracked Beam Method
  • Smart Material Systems
  • Stress Intensity Factor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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