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Cyclic Fatigue Crack Growth in Three‐Point Bending PZT Ceramics under Electromechanical Loading
Author(s) -
Narita Fumio,
Shindo Yasuhide,
Saito Fumitoshi
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01774.x
Subject(s) - materials science , lead zirconate titanate , composite material , piezoelectricity , bending , cyclic stress , ceramic , paris' law , scanning electron microscope , strain energy release rate , crack closure , fracture (geology) , fracture mechanics , crack growth resistance curve , ferroelectricity , optoelectronics , dielectric
This paper investigates experimentally and analytically the cyclic fatigue crack growth in piezoelectric ceramics under electromechanical loading. Cyclic crack growth tests were conducted on lead zirconate titanate (PZT) ceramics subjected to dc electric fields, and a finite element analysis was used to calculate the maximum energy release rate for the permeable crack model. Based on bending experiments using single‐edge precracked‐beam specimens, cyclic fatigue crack growth rates are found to be sensitive to the maximum energy release rate and applied dc electric fields. Possible mechanisms for crack growth were discussed by scanning electron microscope examination of the fracture surface of the PZT ceramics.