Dislocation emission from nanovoid with surface effects

The problem of the dislocation emission from the nanovoid with surface effects under combined loading is investigated. Using the complex variable method, the explicit solutions of the stress fields and the critical stress for dislocation emission are obtained. The influence of the surface properties and the size of the hole on the critical stress are discussed. The results show that dislocations are more difficultly/easily emitted from void due to the local hardening/softening on the surface. And the smaller values of intrinsic lengths make the dislocation emission take place more easily. At the same time, the smaller radius of the hole, the greater effect of the surface stress.