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Numerical Study of Stress Relaxation in Nanostructures in the Course of Uniaxial Straining

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Abstract

Stress relaxation in a nano-sized rod containing structural defects in the course of constant-rate uniaxial straining is studied, and the reasons for the onset of this phenomenon are determined. Under the assumption that structural defects can serve as carriers of irreversible strain of a higher level than dislocations, the problem is solved by the molecular dynamics method. It is found that stress relaxation is accompanied by the transition of the entire system to a steady state with a deeper potential minimum as compared to the system energy before the stress relaxation process, resulting in a temperature increase and reduction of the strain tensor components.

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Authors and Affiliations

  1. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    I. F. Golovnev & E. I. Golovneva

  2. Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    M. S. Voronin & E. R. Pruuel

  3. Novosibirsk State Technical University, Novosibirsk, 630087, Russia

    M. S. Voronin

Authors
  1. I. F. Golovnev
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  2. E. I. Golovneva
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  3. M. S. Voronin
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  4. E. R. Pruuel
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Corresponding author

Correspondence to E. I. Golovneva.

Additional information

Original Russian Text © I.F. Golovnev, E.I. Golovneva, M.S. Voronin, E.R. Pruuel.

Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 60, No. 4, pp. 111–118, July–August, 2019.

This work was supported by the Russian Foundation for Basic Research (Grant No. 16-01-00468).

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Golovnev, I.F., Golovneva, E.I., Voronin, M.S. et al. Numerical Study of Stress Relaxation in Nanostructures in the Course of Uniaxial Straining. J Appl Mech Tech Phy 60, 685–691 (2019). https://doi.org/10.1134/S0021894419040126

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  • DOI: https://doi.org/10.1134/S0021894419040126

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