scholarly journals Analysis of a piezoelectric screw dislocation inside an elliptical inhomogeneity with confocal rigid line in piezoelectric material

2011 ◽  
Vol 1 (6) ◽  
pp. 061002
Author(s):  
Chunzhi Jiang ◽  
Chao Xie ◽  
Youwen Liu ◽  
Xin Zeng
Keyword(s):  
Screw Dislocation ◽  
Piezoelectric Material ◽  
Elliptical Inhomogeneity ◽  
Rigid Line ◽  
Piezoelectric Screw Dislocation

A Magnetoelectric Screw Dislocation Interacting with an Elliptical Inhomogeneity Containing a Confocal Rigid Line

2011 ◽  
Vol 239-242 ◽  
pp. 2195-2200 ◽  
Author(s):  
Chun Zhi Jiang ◽  
You Wen Liu ◽  
Chao Xie
Keyword(s):  
Screw Dislocation ◽  
Electric Displacement ◽  
Image Force ◽  
Material Behavior ◽  
Shear Stresses ◽  
Displacement Fields ◽  
Plane Shear ◽  
Elliptical Inhomogeneity ◽  
Rigid Line ◽  
The Matrix

Based on the complex variable method, the magnetoelectroelastic interaction of a generalized screw dislocation with an elliptical inhomogeneity containing a electrically conductive confocal rigid line under remote anti-plane shear stresses, in-plane electric and magnetic loads is dealt with. The generalized screw dislocation is located inside either the inhomogeneity or the matrix. The analytical-functions of complex potentials for stresses, electric displacement fields and magnetic induction fields in both the inhomogeneity and the matrix are derived. The image force acting on the dislocation are also calculated explicitly. The results show that the influence of the rigid line on the interaction effect between a generalized screw dislocation and an elliptical inhomogeneity is significant. In addition, the material behavior also plays an important role on the image force.

scholarly journals The interaction between a screw dislocation and a rigid line in a confocal elliptical inhomogeneity

2011 ◽  
Vol 35 (3) ◽  
pp. 985-995 ◽  
Author(s):  
Q.H. Fang ◽  
J.M. Chen ◽  
Z.D. Luo ◽  
H.P. Song ◽  
Y.W. Liu
Keyword(s):  
Screw Dislocation ◽  
Elliptical Inhomogeneity ◽  
Rigid Line

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.

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