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Effects of voids in tensile single-crystal Cu nano-beams

Ahadi, Aylin LU ; Hansson, Per LU and Melin, Solveig LU (2018)
Abstract
Molecular dynamic simulations of defect nano-sized beams of single-crystal Cu, loaded in displacement controlled tension until rupture, have been performed. The defects are square-shaped, through-the-thickness voids of different sizes, placed centrally in the beams. Three different cross section sizes and two different crystallographic orientations are investigated.

As expected, the sizes of the beam cross section and the void as well as the crystal orientation strongly influences both the elastic and the plastic behaviors of the beams. It was seen that the strain at plastic initiation increases with beam cross section size as well as with decreasing void size. It is further observed that the void deformed in different ways... (More)
Molecular dynamic simulations of defect nano-sized beams of single-crystal Cu, loaded in displacement controlled tension until rupture, have been performed. The defects are square-shaped, through-the-thickness voids of different sizes, placed centrally in the beams. Three different cross section sizes and two different crystallographic orientations are investigated.

As expected, the sizes of the beam cross section and the void as well as the crystal orientation strongly influences both the elastic and the plastic behaviors of the beams. It was seen that the strain at plastic initiation increases with beam cross section size as well as with decreasing void size. It is further observed that the void deformed in different ways depending on cross section and void size. Sometimes void closure, leading to necking of the beam cross section followed by rupture occurred. In other cases the void elongated leading to that the two ligaments above and below the void ruptured independently.
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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
molecular dynamics; nano-beams; single crystal Cu; voided tensile beams
host publication
Molecular Dynamics
editor
Vakhrushev, Alexander
pages
14 pages
publisher
IntechOpen
ISBN
978-953-51-5980-3
project
Modelling mechanical properties at nanoscale by molecular dynamics
language
English
LU publication?
yes
id
f62e76b0-b36a-4f8c-b45c-3cfc3d546068
date added to LUP
2018-02-02 12:53:32
date last changed
2021-03-29 17:32:33
@inbook{f62e76b0-b36a-4f8c-b45c-3cfc3d546068,
  abstract     = {Molecular dynamic simulations of defect nano-sized beams of single-crystal Cu, loaded in displacement controlled tension until rupture, have been performed. The defects are square-shaped, through-the-thickness voids of different sizes, placed centrally in the beams. Three different cross section sizes and two different crystallographic orientations are investigated. <br/><br/>As expected, the sizes of the beam cross section and the void as well as the crystal orientation strongly influences both the elastic and the plastic behaviors of the beams. It was seen that the strain at plastic initiation increases with beam cross section size as well as with decreasing void size. It is further observed that the void deformed in different ways depending on cross section and void size. Sometimes void closure, leading to necking of the beam cross section followed by rupture occurred. In other cases the void elongated leading to that the two ligaments above and below the void ruptured independently.<br/>},
  author       = {Ahadi, Aylin and Hansson, Per and Melin, Solveig},
  booktitle    = {Molecular Dynamics},
  editor       = {Vakhrushev, Alexander},
  isbn         = {978-953-51-5980-3},
  language     = {eng},
  publisher    = {IntechOpen},
  title        = {Effects of voids in tensile single-crystal Cu nano-beams},
  year         = {2018},
}