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Open Access Research Article

Image Location for Screw Dislocation—A New Point of View

Jeng-Tzong Chen12*, Ying-Te Lee1, Ke-Hsun Chou1 and Jia-Wei Lee1

Author Affiliations

1 Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan

2 Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan

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Boundary Value Problems 2010, 2010:731741  doi:10.1155/2010/731741

Published: 25 March 2010

Abstract

An infinite plane problem with a circular boundary under the screw dislocation is solved by using a new method. The angle-based fundamental solution for screw dislocation is expanded into degenerate kernel. Our method can explain why the image screw dislocation is required. Besides, the location of the image point can be obtained easily by using degenerate kernel after satisfying boundary conditions. Even though the image concept is required, the location of image point can be determined straightforwardly through the degenerate kernel instead of the method of reciprocal radii. Finally, two examples are demonstrated to verify the validity of the present method.