Open AccessThe stress characteristics of metal nanowires: an atomistic simulation study
Author(s) -
Wen Yu-Hua,
Guifang Shao,
Ziqi Zhu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1013
Subject(s) - materials science , nanowire , ultimate tensile strength , surface stress , stress (linguistics) , condensed matter physics , statics , compressive strength , stress field , core (optical fiber) , composite material , molecular dynamics , surface (topology) , nanotechnology , thermodynamics , geometry , physics , classical mechanics , surface energy , linguistics , philosophy , finite element method , mathematics , quantum mechanics
In this paper, we have used molecular statics calculations with the quantum corrected Sutten-Chen type many-body force field to study the stress distribution characteristic of nickel nanowires with 100, 110 and 111 crystallographic orientations in equilibrium state. The simulated results show that tensile stress on the surface of the nanowires causes them to contract along the length. It can be seen that the stress is tensile in surface region while compressive in core region. With the increasing of diameter, the average stress in core region is compressive and strongly decreased to approach to zero, while the surface tensile stress first increases, and then tends to a non-zero constant. The contraction ratio of length, and average stress in core and surface are always largest for 100 nanowire and smallest for 111 nanowire.