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Interface effect on the formation of a dipole of screw misfit dislocations in an embedded nanowire with uniform shear eigenstrain field

Shodja, H. M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.euromechsol.2014.12.006
  3. Publisher: Elsevier Ltd , 2015
  4. Abstract:
  5. The critical condition for the generation of a screw misfit dislocation dipole (MDD) at the interface between a nanowire (NW) with uniform shear misfit strain and its surrounding unbounded matrix within surface/interface elasticity theory is of particular interest. The analysis is carried out using the complex potential variable method. It is shown that the critical radius of the NW corresponding to the onset of the MDD generation decreases with the increase in the uniform shear eigenstrain inside the NW as well as when the stiffness of the NW increases with respect to the matrix. The critical radius strongly depends on the non-classical interface parameter. Comparison is made with classical solution, which can be obtained as the special case of the surface/interface elasticity theory
  6. Keywords:
  7. Embedded nanowire ; Screw misfit dislocation dipole ; Surface/interface elasticity ; Dislocations (crystals) ; Elasticity ; Heterojunctions ; Lanthanum compounds ; Nanowires ; Screws ; Shear flow ; Stiffness matrix ; Classical solutions ; Complex potentials ; Critical condition ; Critical radius ; Elasticity theory ; Interface effect ; Interface parameters ; Surface/interface ; Screw dislocations
  8. Source: European Journal of Mechanics, A/Solids ; Volume 51 , May–June , 2015 , Pages 154-159 ; 09977538 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0997753814001879