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Influence of fatigue load range on the growth of a microstructurally short edge crack simulated by a discrete dislocation formulation

Hansson, Per LU and Melin, Solveig LU (2006) In International Journal of Fatigue 28(7). p.714-721
Abstract
Quasistatic propagation of a short edge crack, located within one grain of a bcc material has been studied using a discrete dislocation technique. The geometry is modelled by distributed dislocation dipole elements and the plasticity by discrete dislocations. The crack is assumed to grow through a single shear mechanism due to nucleation and annihilation of dislocations along preferred slip planes in the material. The change in growth rates due to different load cycles and due to a small single overload was investigated. It was found that the growth rates were strongly influenced by the applied load cycles, and that a single overload affects the growth differently depending on the number of cycles prior to the overload. (c) 2005 Elsevier... (More)
Quasistatic propagation of a short edge crack, located within one grain of a bcc material has been studied using a discrete dislocation technique. The geometry is modelled by distributed dislocation dipole elements and the plasticity by discrete dislocations. The crack is assumed to grow through a single shear mechanism due to nucleation and annihilation of dislocations along preferred slip planes in the material. The change in growth rates due to different load cycles and due to a small single overload was investigated. It was found that the growth rates were strongly influenced by the applied load cycles, and that a single overload affects the growth differently depending on the number of cycles prior to the overload. (c) 2005 Elsevier Ltd. All rights reserved. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
overload, single shear, short crack, discrete dislocation, fatigue
in
International Journal of Fatigue
volume
28
issue
7
pages
714 - 721
publisher
Elsevier
external identifiers
  • wos:000237999900004
  • scopus:33645967450
ISSN
1879-3452
DOI
10.1016/j.ijfatigue.2005.09.001
language
English
LU publication?
yes
id
8bd86fa3-2d8a-4478-9b0d-8e3d78c50872 (old id 407445)
date added to LUP
2016-04-01 12:01:09
date last changed
2020-07-01 01:59:09
@article{8bd86fa3-2d8a-4478-9b0d-8e3d78c50872,
  abstract     = {Quasistatic propagation of a short edge crack, located within one grain of a bcc material has been studied using a discrete dislocation technique. The geometry is modelled by distributed dislocation dipole elements and the plasticity by discrete dislocations. The crack is assumed to grow through a single shear mechanism due to nucleation and annihilation of dislocations along preferred slip planes in the material. The change in growth rates due to different load cycles and due to a small single overload was investigated. It was found that the growth rates were strongly influenced by the applied load cycles, and that a single overload affects the growth differently depending on the number of cycles prior to the overload. (c) 2005 Elsevier Ltd. All rights reserved.},
  author       = {Hansson, Per and Melin, Solveig},
  issn         = {1879-3452},
  language     = {eng},
  number       = {7},
  pages        = {714--721},
  publisher    = {Elsevier},
  series       = {International Journal of Fatigue},
  title        = {Influence of fatigue load range on the growth of a microstructurally short edge crack simulated by a discrete dislocation formulation},
  url          = {http://dx.doi.org/10.1016/j.ijfatigue.2005.09.001},
  doi          = {10.1016/j.ijfatigue.2005.09.001},
  volume       = {28},
  year         = {2006},
}