Effect of remanent polarization on electro-mechanical fields near an elliptic cavity or a crack in piezoelectric ceramics

被引:0
|
作者
Liu, B [1 ]
Fang, DN [1 ]
Hwang, KC [1 ]
机构
[1] Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China
来源
FRACTURE AND STRENGTH OF SOLIDS, PTS 1 AND 2 | 2000年 / 183-1卷
关键词
cavity; crack; piezoelectric ceramics; remanent polarization;
D O I
10.4028/www.scientific.net/KEM.183-187.821
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this paper the effect of remanent polarization on electric-mechanical fields near an elliptic cavity or a crack in piezoelectric ceramics is studied. The analysis is based on the application of exact electric boundary conditions at the rim of an elliptic cavity and/or a crack. The solutions are derived in a closed form in terms of complex potentials. The result shows that the cavity problem of remanent polarization is similar to the problem of general strain mismatch and the effect of remanent polarization can not be omitted. The same conclusion can also be obtained by adopting the nonlinear boundary conditions for a sharp crack problem. By use of this model we can get calculation results to explain some experimental results.
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页码:821 / 826
页数:6
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