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A Journal of Russian Academy of Sciences
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A.E. Romanov, A.L. Kolesnikova, and M.Yu. Gutkin, "Internal Stresses and Structural Defects in Nanowires," Mech. Solids. 57 (8), 1987-2004 (2022)
Year 2022 Volume 57 Number 8 Pages 1987-2004
DOI 10.3103/S0025654422080246
Title Internal Stresses and Structural Defects in Nanowires
Author(s) A.E. Romanov (St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), St. Petersburg, 197101 Russia, alexey.romanov@niuitmo.ru)
A.L. Kolesnikova (St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), St. Petersburg, 197101 Russia; Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, St. Petersburg, 199178 Russia)
M.Yu. Gutkin (St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), St. Petersburg, 197101 Russia; Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, St. Petersburg, 199178 Russia; Peter the Great St. Petersburg Polytechnic University (SPbPU), St. Petersburg, 195251 Russia)
Abstract The sources of internal stresses in nanowires are considered, the model of which is an infinite elastically isotropic cylinder of circular cross section. Sources of internal stresses are defects that have their own distortion (eigenstrain) and are localized either at a point, on a line, on the surface, or in a region inside the nanowire. Relations are given for the elastic fields and energies of some defects in nanowires, including rectilinear (straight) dislocations and disclinations, dislocation loops, and dilatation inclusions. The interaction between sources of internal stresses in an elastic cylinder is analyzed. The role of the found solutions to the problems of solid mechanics in the interpretation of relaxation processes in pentagonal nanowires and hybrid semiconductor nanostructures with radial and axial heterointerfaces is discussed.
Keywords nanowire, dislocation, disclination, lattice misfit, dilatation inclusion, mechanical stresses, elastic energy
Received 14 March 2022Revised 07 May 2022Accepted 15 May 2022
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