A generalized screw dislocation near a wedge-shaped magnetoelectroelastic bi-material interface

The magnetoelectroelastic solution of a generalized screw dislocation interacting with a wedge-shaped magnetoelectroelastic bi-material interface is derived in this paper. The screw dislocation is assumed to be straight and infinitely long in the z -direction and suffers a finite discontinuity in th...

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Bibliographic Details
Published in:Acta mechanica 2010-11, Vol.214 (3-4), p.261-273
Main Authors: Xiao, Z. M., Chen, B. J., Luo, J.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Condensed matter: structure, mechanical and thermal properties
Control
Defects and impurities in crystals
microstructure
Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.)
Discontinuity
Dislocations
Dynamical Systems
Electric potential
Electricians
Engineering
Engineering Thermodynamics
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Heat and Mass Transfer
Image force
Interfaces
Magnetism
Mathematical analysis
Mathematical models
Physics
Screw dislocations
Solid Mechanics
Static elasticity (thermoelasticity...)
Structural and continuum mechanics
Structure of solids and liquids
crystallography
Theoretical and Applied Mechanics
Vibration
Wedges
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Summary:The magnetoelectroelastic solution of a generalized screw dislocation interacting with a wedge-shaped magnetoelectroelastic bi-material interface is derived in this paper. The screw dislocation is assumed to be straight and infinitely long in the z -direction and suffers a finite discontinuity in the displacement, electric potential and magnetic potential across the slip plane. The explicit closed-form analytical solution for the generalized stress field is derived by means of the complex variable and conformal mapping methods. The generalized stress intensity factors of the wedge tip induced by the dislocation and the image force acting on the dislocation are formulated and calculated. The influence of the wedge angle and the different bi-material constant combinations on the image force is discussed. Numerical examples for three particular wedge angles are calculated and compared with other available results.
ISSN:0001-5970
1619-6937
DOI:10.1007/s00707-010-0286-9