This article is cited in 1 paper

Numerical study of stress relaxation in nanostructures in the course of uniaxial straining

I. F. Golovnev^a, E. I. Golovneva^a, M. S. Voronin^ab, È. R. Pruuel<sup>a

a</sup> Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
^b Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

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 deformation 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.

Keywords: molecular dynamics method, stress relaxation, nano-sized rod, crystal lattice defects, carrier of irreversible deformation.

UDC: 539.3

Received: 02.10.2018
Revised: 02.10.2018
Accepted: 25.03.2019

DOI: 10.15372/PMTF20190412

 English version: Journal of Applied Mechanics and Technical Physics, 2019, 60:4, 685–691

Bibliographic databases:

•