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Grain boundary influence during short fatigue crack growth using a discrete dislocation technique

Hansson, Per LU and Melin, Solveig LU (2008) In Strength of Materials 40(1). p.150-153
Abstract
We have studied the effect of a grain boundary in front of a short edge crack on its propagation under cyclic loading conditions in bcc iron. The used model is a combination of a discrete dislocation formulation and a boundary element approach where the boundary is described by dislocation dipole elements, while the local plasticity is modeled by discrete dislocations. The grain boundary is considered impenetrable, but dislocations positioned in the vicinity of a grain boundary give raise to high stresses in neighboring grains which, eventually, results in nucleation of dislocations and a spread of the plastic zone into the next grain.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
discrete dislocation, atigue, grain boundary
in
Strength of Materials
volume
40
issue
1
pages
150 - 153
publisher
Springer
external identifiers
  • wos:000262960300039
  • scopus:40749105259
ISSN
0039-2316
DOI
10.1007/s11223-008-0039-3
language
English
LU publication?
yes
id
3701617d-f177-45e0-99e2-d9af756cecf7 (old id 1047227)
date added to LUP
2008-03-11 14:09:56
date last changed
2017-01-01 05:50:24
@article{3701617d-f177-45e0-99e2-d9af756cecf7,
  abstract     = {We have studied the effect of a grain boundary in front of a short edge crack on its propagation under cyclic loading conditions in bcc iron. The used model is a combination of a discrete dislocation formulation and a boundary element approach where the boundary is described by dislocation dipole elements, while the local plasticity is modeled by discrete dislocations. The grain boundary is considered impenetrable, but dislocations positioned in the vicinity of a grain boundary give raise to high stresses in neighboring grains which, eventually, results in nucleation of dislocations and a spread of the plastic zone into the next grain.},
  author       = {Hansson, Per and Melin, Solveig},
  issn         = {0039-2316},
  keyword      = {discrete dislocation,atigue,grain boundary},
  language     = {eng},
  number       = {1},
  pages        = {150--153},
  publisher    = {Springer},
  series       = {Strength of Materials},
  title        = {Grain boundary influence during short fatigue crack growth using a discrete dislocation technique},
  url          = {http://dx.doi.org/10.1007/s11223-008-0039-3},
  volume       = {40},
  year         = {2008},
}