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Computationally efficient modelling of short fatigue crack growth using dislocation formulations

Hansson, Per LU ; Melin, Solveig LU and Persson, Christer LU (2008) In Engineering Fracture Mechanics 75(10). p.3189-3205
Abstract (Swedish)
Abstract in Undetermined

In an attempt to develop it computationally efficient model for simulation of fatigue crack growth of microstructurally short cracks two dislocation based models have been compared. In both models, the geometry of the boundary and the crack is described using dislocation dipole elements, whereas the plasticity is described either by discrete dislocations or by distributed dipole elements. The two models were found to agree qualitatively its well as quantitatively. It was concluded that modelling the plasticity by dipole elements becomes comparatively increasingly more time efficient with increasing grain size plastic zone size. However, plasticity modelling by dipole elements showed to provide... (More)
Abstract in Undetermined

In an attempt to develop it computationally efficient model for simulation of fatigue crack growth of microstructurally short cracks two dislocation based models have been compared. In both models, the geometry of the boundary and the crack is described using dislocation dipole elements, whereas the plasticity is described either by discrete dislocations or by distributed dipole elements. The two models were found to agree qualitatively its well as quantitatively. It was concluded that modelling the plasticity by dipole elements becomes comparatively increasingly more time efficient with increasing grain size plastic zone size. However, plasticity modelling by dipole elements showed to provide somewhat higher crack growth rates. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
short crack, discrete dislocation, distributed dislocations, single shear, fatigue
in
Engineering Fracture Mechanics
volume
75
issue
10
pages
3189 - 3205
publisher
Elsevier
external identifiers
  • wos:000256014600023
  • scopus:40849111444
ISSN
1873-7315
DOI
10.1016/j.engfracmech.2007.12.002
language
English
LU publication?
yes
id
fba7f458-002e-41a9-99ef-c86dbe29b742 (old id 777201)
date added to LUP
2008-02-12 08:14:30
date last changed
2017-01-15 03:59:23
@article{fba7f458-002e-41a9-99ef-c86dbe29b742,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
In an attempt to develop it computationally efficient model for simulation of fatigue crack growth of microstructurally short cracks two dislocation based models have been compared. In both models, the geometry of the boundary and the crack is described using dislocation dipole elements, whereas the plasticity is described either by discrete dislocations or by distributed dipole elements. The two models were found to agree qualitatively its well as quantitatively. It was concluded that modelling the plasticity by dipole elements becomes comparatively increasingly more time efficient with increasing grain size plastic zone size. However, plasticity modelling by dipole elements showed to provide somewhat higher crack growth rates.},
  author       = {Hansson, Per and Melin, Solveig and Persson, Christer},
  issn         = {1873-7315},
  keyword      = {short crack,discrete dislocation,distributed dislocations,single shear,fatigue},
  language     = {eng},
  number       = {10},
  pages        = {3189--3205},
  publisher    = {Elsevier},
  series       = {Engineering Fracture Mechanics},
  title        = {Computationally efficient modelling of short fatigue crack growth using dislocation formulations},
  url          = {http://dx.doi.org/10.1016/j.engfracmech.2007.12.002},
  volume       = {75},
  year         = {2008},
}