Boundary Value Problems
Volume 2010 (2010), Article ID 731741, 13 pages
doi:10.1155/2010/731741
Research Article

Image Location for Screw Dislocation—A New Point of View

Jeng-Tzong Chen,1,2 Ying-Te Lee,1 Ke-Hsun Chou,1 and Jia-Wei Lee1

1Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan
2Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan

Received 16 June 2009; Accepted 18 January 2010

Academic Editor: Colin Rogers

Copyright © 2010 Jeng-Tzong Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.