The discrete nature of the growth and arrest of microstructurally short fatigue cracks modelled by dislocation technique
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/260139
- author
- Bjerkén, Christina LU
- organization
- publishing date
- 2005
- 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
- 2016-04-01 12:00:58
- date last changed
- 2022-01-26 21:34:03
@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}}, keywords = {{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}}, doi = {{10.1016/j.ijfatigue.2004.06.012}}, volume = {{27}}, year = {{2005}}, }