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Stress analysis of highly constrained copper strips with through crack shaped voids using molecular dynamics

Johansson, Dan LU ; Hansson, Per LU and Melin, Solveig LU (2014) 7th International Conference on Materials Structure and Micromechanics of Fracture (MSMF 7) In Materials Structure & Micromechanics of Fracture VII (Key Engineering Materials) 592-593. p.43-46
Abstract
A small rectangular strip of fcc Cu, containing a through crack on the nanoscale and subjected to loading under displacement control, is simulated using molecular dynamics (MD). The geometry is highly constrained and chosen to mimic that of a thin strip between two stiff layers. The Lennard-Jones pair potential is used for the inter-atomic forces. The centrally placed crack shaped void is created by removing a few atoms inside the specimen. The crack is loaded perpendicular to the crack plane and the tensile stress is studied as it varies over the thickness of the strip. Comparisons with finite element calculations are made and the goal is to find a limit in model size beneath which the finite element (FE) solutions and linear elastic... (More)
A small rectangular strip of fcc Cu, containing a through crack on the nanoscale and subjected to loading under displacement control, is simulated using molecular dynamics (MD). The geometry is highly constrained and chosen to mimic that of a thin strip between two stiff layers. The Lennard-Jones pair potential is used for the inter-atomic forces. The centrally placed crack shaped void is created by removing a few atoms inside the specimen. The crack is loaded perpendicular to the crack plane and the tensile stress is studied as it varies over the thickness of the strip. Comparisons with finite element calculations are made and the goal is to find a limit in model size beneath which the finite element (FE) solutions and linear elastic fracture mechanics (LEFM) lose their accuracy. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Fracture mechanics, Plane stress, Plane strain, Molecular dynamics
in
Materials Structure & Micromechanics of Fracture VII (Key Engineering Materials)
volume
592-593
pages
43 - 46
publisher
Trans Tech Publications Ltd
conference name
7th International Conference on Materials Structure and Micromechanics of Fracture (MSMF 7)
external identifiers
  • wos:000336694400006
  • scopus:84891890540
ISSN
1013-9826
DOI
10.4028/www.scientific.net/KEM.592-593.43
language
English
LU publication?
yes
id
b9dcbfed-f1da-4995-b7e5-69acc7bf9b21 (old id 4558612)
date added to LUP
2014-07-17 12:35:02
date last changed
2017-01-01 06:29:15
@inproceedings{b9dcbfed-f1da-4995-b7e5-69acc7bf9b21,
  abstract     = {A small rectangular strip of fcc Cu, containing a through crack on the nanoscale and subjected to loading under displacement control, is simulated using molecular dynamics (MD). The geometry is highly constrained and chosen to mimic that of a thin strip between two stiff layers. The Lennard-Jones pair potential is used for the inter-atomic forces. The centrally placed crack shaped void is created by removing a few atoms inside the specimen. The crack is loaded perpendicular to the crack plane and the tensile stress is studied as it varies over the thickness of the strip. Comparisons with finite element calculations are made and the goal is to find a limit in model size beneath which the finite element (FE) solutions and linear elastic fracture mechanics (LEFM) lose their accuracy.},
  author       = {Johansson, Dan and Hansson, Per and Melin, Solveig},
  booktitle    = {Materials Structure & Micromechanics of Fracture VII (Key Engineering Materials)},
  issn         = {1013-9826},
  keyword      = {Fracture mechanics,Plane stress,Plane strain,Molecular dynamics},
  language     = {eng},
  pages        = {43--46},
  publisher    = {Trans Tech Publications Ltd},
  title        = {Stress analysis of highly constrained copper strips with through crack shaped voids using molecular dynamics},
  url          = {http://dx.doi.org/10.4028/www.scientific.net/KEM.592-593.43},
  volume       = {592-593},
  year         = {2014},
}