Electroelastic interaction between a piezoelectric screw dislocation and a confocal elliptic blunt crack with elliptical inhomogeneity

2010 ◽  
Vol 54 (3) ◽  
pp. 156-165 ◽  
Author(s):  
M. Yu ◽  
Y.W. Liu ◽  
H.P. Song ◽  
C. Xie
Keyword(s):  
Screw Dislocation ◽  
Blunt Crack ◽  
Elliptical Inhomogeneity ◽  
Piezoelectric Screw Dislocation

Screw Dislocations Emitted from a Blunt Crack in a Piezoelectric Material

2014 ◽  
Vol 891-892 ◽  
pp. 1742-1748
Author(s):  
Hao Peng Song ◽  
Cun Fa Gao
Keyword(s):  
Dielectric Constant ◽  
Screw Dislocation ◽  
Piezoelectric Material ◽  
Arbitrary Distribution ◽  
Dislocation Emission ◽  
Screw Dislocations ◽  
Blunt Crack ◽  
Series Form ◽  
Piezoelectric Screw Dislocation

The problem of a piezoelectric screw dislocation emitted from a blunt crack is dealt with in this paper. For an arbitrary distribution of the residual dislocation, the series-form solutions are derived. The results show that the force acting on the dislocation decreases with the value of the dielectric constant within the crack increasing. And the increase of the dielectric constant within the crack helps dislocation emission effectively.

A Piezoelectric Screw Dislocation Interacting with a Dielectric Crack in a Hexagonal Piezoelectric Material

2005 ◽  
Vol 9 ◽  
pp. 183-190
Author(s):  
Jin Xi Liu ◽  
X.L. Liu
Keyword(s):  
Electric Field ◽  
Screw Dislocation ◽  
Electric Displacement ◽  
Image Force ◽  
Mapping Method ◽  
Piezoelectric Medium ◽  
Intensity Factors ◽  
Potential Jump ◽  
Piezoelectric Screw Dislocation ◽  
Dielectric Crack

This paper is concerned with the interaction of a piezoelectric screw dislocation with a semi-infinite dielectric crack in a piezoelectric medium with hexagonal symmetry. The solution of the considered problem is obtained from the dislocation solution of a piezoelectric half-plane adjoining a gas medium of dielectric constant ε0 by using the conformal mapping method. The intensity factors of stress, electric displacement and electric field and the image force on the dislocation are given explicitly. The effect of electric boundary conditions on the dislocation-crack interaction is analyzed and discussed in detail. The results show that ε0 only influences the electric displacement and electric field intensity factors and the image force produced by the electric potential jump.

Interaction of a piezoelectric screw dislocation with an insulating crack

2002 ◽  
Vol 82 (15) ◽  
pp. 2805-2824 ◽  
Author(s):  
Tong-Yi Zhang ◽  
Tian-Hong Wang ◽  
Ming-Hao Zhao
Keyword(s):  
Screw Dislocation ◽  
Piezoelectric Screw Dislocation
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