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A dislocation model for the two critical stress intensities required for threshold fatigue crack propagation

Abstract:

We have examined the variations, with decreasing load ratio, of threshold peak and cyclic stress intensities required for fatigue crack growth in stage I (mainly mode II loading) using a simple model simulating dislocation motion near a crack tip. In this model the crack grows by dislocations running into the crack during loading and unloading phases. Initially we have studied the behaviour of a crack with a dislocation source relatively far away from the crack tip. Crack propagation rates sh...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
Journal:
SCRIPTA MATERIALIA More from this journal
Volume:
35
Issue:
11
Pages:
1365-1371
Publication date:
1996-12-01
DOI:
ISSN:
1359-6462
Language:
English
Pubs id:
pubs:1980
UUID:
uuid:6e264cea-2e60-4ab8-a994-970bc8ca1dba
Local pid:
pubs:1980
Source identifiers:
1980
Deposit date:
2012-12-19

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