On the Stress Field and Dislocation Emission of an Elliptically Blunted Mode III Crack with Surface Stress Effect
The stress field of an elliptically blunted crack under remote antiplane shear loading and its interaction with a nearby screw dislocation are investigated with the complex variable method. The Gurtin-Murdoch model is adopted to characterize the surface stress effect of the nano blunt crack. It is found that the surface stress effect can influence the stress field of the nano blunt crack, the critical load for dislocation emission and the shielding effect of the dislocation significantly.
KeywordsCritical Load Energy Release Rate Surface Effect Screw Dislocation Polar Coordinate System
This project is supported by National Natural Science Foundation of China (Grant No. 10802032) and Research Fund for the Doctoral Program of Higher Education of China (No. 200804871001).