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Size dependence of the Poisson's ratio in single-crystal fcc copper nanobeams

Ahadi, Aylin LU and Melin, Solveig LU (2016) In Computational Materials Science 111. p.322-327
Abstract
Elastic simulations of single-crystal copper nanobeams, of different cross section sizes and with crystallographic orientations [100] and [110] along their length directions, have been performed applying tensile mechanical loading. The molecular dynamics code LAMMPS was employed for the simulations. The Poisson's ratio, which is one of the fundamental measures of the elastic deformation behaviour of materials, has been determined. In this paper we present numerical evidence that the Poisson's ratio of nanobeams loaded by finite strains varies with both size and crystallographic orientation. In particular, we provide numerical evidence for that, of the two Poisson's ratio that naturally can be defined for nanobeams loaded in the... (More)
Elastic simulations of single-crystal copper nanobeams, of different cross section sizes and with crystallographic orientations [100] and [110] along their length directions, have been performed applying tensile mechanical loading. The molecular dynamics code LAMMPS was employed for the simulations. The Poisson's ratio, which is one of the fundamental measures of the elastic deformation behaviour of materials, has been determined. In this paper we present numerical evidence that the Poisson's ratio of nanobeams loaded by finite strains varies with both size and crystallographic orientation. In particular, we provide numerical evidence for that, of the two Poisson's ratio that naturally can be defined for nanobeams loaded in the [110]-direction, one is negative whereas the other one remains almost constant, irrespective of applied strain. We also show that for nanobeams loaded in the [100]-direction the values of Poisson's ratio initially decrease, reaches a minimum and thereafter increase with applied strain. For the smallest [100] cross sections the Poisson's ratios are initially negative, but turn positive at larger strains. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
single-crystal copper, size effects, nanobeam, molecular dynamics, Poisson's ratio
in
Computational Materials Science
volume
111
pages
322 - 327
publisher
Elsevier
external identifiers
  • wos:000364164400044
  • other:10.1016/j.commatsci.2015.09.026
  • scopus:84944064503
ISSN
0927-0256
DOI
10.1016/j.commatsci.2015.09.026
language
English
LU publication?
yes
id
12fbd6c6-f053-4553-a33f-f29346943e99 (old id 7868003)
date added to LUP
2015-09-29 12:57:44
date last changed
2017-05-21 04:03:40
@article{12fbd6c6-f053-4553-a33f-f29346943e99,
  abstract     = {Elastic simulations of single-crystal copper nanobeams, of different cross section sizes and with crystallographic orientations [100] and [110] along their length directions, have been performed applying tensile mechanical loading. The molecular dynamics code LAMMPS was employed for the simulations. The Poisson's ratio, which is one of the fundamental measures of the elastic deformation behaviour of materials, has been determined. In this paper we present numerical evidence that the Poisson's ratio of nanobeams loaded by finite strains varies with both size and crystallographic orientation. In particular, we provide numerical evidence for that, of the two Poisson's ratio that naturally can be defined for nanobeams loaded in the [110]-direction, one is negative whereas the other one remains almost constant, irrespective of applied strain. We also show that for nanobeams loaded in the [100]-direction the values of Poisson's ratio initially decrease, reaches a minimum and thereafter increase with applied strain. For the smallest [100] cross sections the Poisson's ratios are initially negative, but turn positive at larger strains.},
  author       = {Ahadi, Aylin and Melin, Solveig},
  issn         = {0927-0256},
  keyword      = {single-crystal copper,size effects,nanobeam,molecular dynamics,Poisson's ratio},
  language     = {eng},
  pages        = {322--327},
  publisher    = {Elsevier},
  series       = {Computational Materials Science},
  title        = {Size dependence of the Poisson's ratio in single-crystal fcc copper nanobeams},
  url          = {http://dx.doi.org/10.1016/j.commatsci.2015.09.026},
  volume       = {111},
  year         = {2016},
}