Static fatigue of three-point bending piezoelectric ceramics with a single-edge crack under AC electric fields

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[1] Shindo, Yasuhide
[2] Narita, Fumio
[3] Morikawa, Yu
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Shindo, Y. (shindo@material.tohoku.ac.jp) | 1600年 / Blackwell Publishing Inc.卷 / 95期
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This article investigates experimentally and analytically the static fatigue behavior of cracked piezoelectric ceramics under ac electric fields. Static fatigue tests were carried out in three-point bending with the single-edge precracked-beam specimens. The crack was created normal to the poling direction. Time-to-failure under different mechanical loads and ac electric fields were obtained from the experiment. A phenomenological model of domain wall motion was also used in finite element computation; and the energy release rate for the permeable crack model was calculated. The effect of ac electric fields on the energy release rate versus lifetime curve was then examined. © 2011 The American Ceramic Society;
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