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Dislocation-based modelling of the growth of a micro structurally short crack by single shear due to fatigue loading

Hansson, Per LU and Melin, Solveig LU (2005) In International Journal of Fatigue 27(4). p.347-356
Abstract
The growth of a short edge crack, located within one grain in a bcc crystal and subjected to cyclic loading, is modelled using a dislocation formulation. The external boundary including the crack itself is built from dislocation dipole elements and the plasticity is represented by discrete dislocations moving along preferred slip planes. The crack propagates by single shear due to emission and annihilation of dislocations, leading to a zigzag shaped crack path. The method allows simulation of the crack growth path, crack shape and the development of the plastic zone in detail. It is shown that the grain orientation, orientation of the activated slip systems, the load and the initial crack configuration all together determines the exact... (More)
The growth of a short edge crack, located within one grain in a bcc crystal and subjected to cyclic loading, is modelled using a dislocation formulation. The external boundary including the crack itself is built from dislocation dipole elements and the plasticity is represented by discrete dislocations moving along preferred slip planes. The crack propagates by single shear due to emission and annihilation of dislocations, leading to a zigzag shaped crack path. The method allows simulation of the crack growth path, crack shape and the development of the plastic zone in detail. It is shown that the grain orientation, orientation of the activated slip systems, the load and the initial crack configuration all together determines the exact path. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
single shear, dislocation dipole, short crack, discrete dislocation, stage I fatigue
in
International Journal of Fatigue
volume
27
issue
4
pages
347 - 356
publisher
Elsevier
external identifiers
  • wos:000226987100002
  • scopus:10844230920
ISSN
1879-3452
DOI
10.1016/j.ijfatigue.2004.09.002
language
English
LU publication?
yes
id
a1b6979b-f5e0-4c12-8b85-be943a431211 (old id 254458)
date added to LUP
2007-08-08 15:38:44
date last changed
2017-03-26 03:39:39
@article{a1b6979b-f5e0-4c12-8b85-be943a431211,
  abstract     = {The growth of a short edge crack, located within one grain in a bcc crystal and subjected to cyclic loading, is modelled using a dislocation formulation. The external boundary including the crack itself is built from dislocation dipole elements and the plasticity is represented by discrete dislocations moving along preferred slip planes. The crack propagates by single shear due to emission and annihilation of dislocations, leading to a zigzag shaped crack path. The method allows simulation of the crack growth path, crack shape and the development of the plastic zone in detail. It is shown that the grain orientation, orientation of the activated slip systems, the load and the initial crack configuration all together determines the exact path.},
  author       = {Hansson, Per and Melin, Solveig},
  issn         = {1879-3452},
  keyword      = {single shear,dislocation dipole,short crack,discrete dislocation,stage I fatigue},
  language     = {eng},
  number       = {4},
  pages        = {347--356},
  publisher    = {Elsevier},
  series       = {International Journal of Fatigue},
  title        = {Dislocation-based modelling of the growth of a micro structurally short crack by single shear due to fatigue loading},
  url          = {http://dx.doi.org/10.1016/j.ijfatigue.2004.09.002},
  volume       = {27},
  year         = {2005},
}