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The discrete nature of the growth and arrest of microstructurally short fatigue cracks modelled by dislocation technique

Bjerkén, Christina LU (2005) In International Journal of Fatigue 27(1). p.21-32
Abstract
Growth of a microstructurally short edge crack in the neighbourhood of a grain boundary has been studied using a dislocation technique. Influence of the distance between the crack tip and a high-angle grain boundary was studied for 5000 load cycles. Growth rate was found to change stepwise during crack advance, both accelerating and decelerating, and finally retarding before crack arrest. Crack propagation is ruled by the competition between the shielding effect from the dislocations in the plastic zone and the stress field increase due to crack extension, and clearly shows a discrete behaviour at growth below the fatigue threshold load.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
dislocation, crack arrest, short crack growth, grain boundary
in
International Journal of Fatigue
volume
27
issue
1
pages
21 - 32
publisher
Elsevier
external identifiers
  • wos:000225178800002
  • scopus:7444225860
ISSN
1879-3452
DOI
10.1016/j.ijfatigue.2004.06.012
language
English
LU publication?
yes
id
ab70185f-7292-42c9-ab5b-5d0f6a45c1dd (old id 260139)
date added to LUP
2007-09-17 19:42:04
date last changed
2017-01-01 04:45:25
@article{ab70185f-7292-42c9-ab5b-5d0f6a45c1dd,
  abstract     = {Growth of a microstructurally short edge crack in the neighbourhood of a grain boundary has been studied using a dislocation technique. Influence of the distance between the crack tip and a high-angle grain boundary was studied for 5000 load cycles. Growth rate was found to change stepwise during crack advance, both accelerating and decelerating, and finally retarding before crack arrest. Crack propagation is ruled by the competition between the shielding effect from the dislocations in the plastic zone and the stress field increase due to crack extension, and clearly shows a discrete behaviour at growth below the fatigue threshold load.},
  author       = {Bjerkén, Christina},
  issn         = {1879-3452},
  keyword      = {dislocation,crack arrest,short crack growth,grain boundary},
  language     = {eng},
  number       = {1},
  pages        = {21--32},
  publisher    = {Elsevier},
  series       = {International Journal of Fatigue},
  title        = {The discrete nature of the growth and arrest of microstructurally short fatigue cracks modelled by dislocation technique},
  url          = {http://dx.doi.org/10.1016/j.ijfatigue.2004.06.012},
  volume       = {27},
  year         = {2005},
}