A tool to model short crack fatigue growth using a discrete dislocation formulation
(2003) In International Journal of Fatigue 25(6). p.559-566- Abstract
- A method is presented that combines the modelling of cracks by distributed dislocation dipoles with developing plasticity represented by discrete dislocations moving along slip bands. Crack growth is due to the emission of dislocations from the crack tip along preferred slip planes. Eventual annihilation of dislocations occurs by reunion with the corresponding displacement steps of the crack surface. Crack surface overlap is not allowed. The equilibrium state for each load increment is solved iteratively, allowing various crack geometries. The method is applied to the problem of a short edge crack growing in mode I due to fatigue loading. It is shown that the development of a local plastic zone and the propagation of the crack can be... (More)
- A method is presented that combines the modelling of cracks by distributed dislocation dipoles with developing plasticity represented by discrete dislocations moving along slip bands. Crack growth is due to the emission of dislocations from the crack tip along preferred slip planes. Eventual annihilation of dislocations occurs by reunion with the corresponding displacement steps of the crack surface. Crack surface overlap is not allowed. The equilibrium state for each load increment is solved iteratively, allowing various crack geometries. The method is applied to the problem of a short edge crack growing in mode I due to fatigue loading. It is shown that the development of a local plastic zone and the propagation of the crack can be monitored in detail. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/312066
- author
- Bjerkén, Christina LU and Melin, Solveig LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- short cracks, dislocation dipoles, discrete dislocations, fatigue
- in
- International Journal of Fatigue
- volume
- 25
- issue
- 6
- pages
- 559 - 566
- publisher
- Elsevier
- external identifiers
-
- wos:000182643600010
- scopus:0037409853
- ISSN
- 1879-3452
- DOI
- 10.1016/S0142-1123(02)00144-5
- language
- English
- LU publication?
- yes
- id
- 5677e2c7-fac4-42e3-8198-ec3c8b815777 (old id 312066)
- date added to LUP
- 2016-04-01 12:20:59
- date last changed
- 2022-02-03 21:01:35
@article{5677e2c7-fac4-42e3-8198-ec3c8b815777,
abstract = {{A method is presented that combines the modelling of cracks by distributed dislocation dipoles with developing plasticity represented by discrete dislocations moving along slip bands. Crack growth is due to the emission of dislocations from the crack tip along preferred slip planes. Eventual annihilation of dislocations occurs by reunion with the corresponding displacement steps of the crack surface. Crack surface overlap is not allowed. The equilibrium state for each load increment is solved iteratively, allowing various crack geometries. The method is applied to the problem of a short edge crack growing in mode I due to fatigue loading. It is shown that the development of a local plastic zone and the propagation of the crack can be monitored in detail.}},
author = {{Bjerkén, Christina and Melin, Solveig}},
issn = {{1879-3452}},
keywords = {{short cracks; dislocation dipoles; discrete dislocations; fatigue}},
language = {{eng}},
number = {{6}},
pages = {{559--566}},
publisher = {{Elsevier}},
series = {{International Journal of Fatigue}},
title = {{A tool to model short crack fatigue growth using a discrete dislocation formulation}},
url = {{http://dx.doi.org/10.1016/S0142-1123(02)00144-5}},
doi = {{10.1016/S0142-1123(02)00144-5}},
volume = {{25}},
year = {{2003}},
}