The stress field of a screw dislocation inside an embedded nanowire was considered within the theory of strain-gradient elasticity. It was shown that the stress singularity was removed and all stress components were continuous and smooth across the interface, in contrast with the results obtained within the classical theory of elasticity. The maximum magnitude of dislocation stress depended greatly on the dislocation position, the nanowire size, and the ratios of shear moduli and gradient coefficients of the matrix and nanowire materials.

Analysis of Stress Field of a Screw Dislocation inside an Embedded Nanowire using Strain Gradient Elasticity. K.M.Davoudi, M.Y.Gutkin, H.M.Shodja: Scripta Materialia, 2009, 61[4], 355-8