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Modelling crack tip plastic zones and brittle-ductile transitions

Abstract:

Plasticity at crack tips may be modelled as self-organising arrays of dislocations emitted from a source near the crack tip. For materials where dislocation motion is slow and any friction stress is low, the modelled arrays are far from equilibrium. If dislocation motion is fast, and there is a substantial dislocation pinning stress, tau(f), the arrays are quasi-static and the model predicts behaviour very similar to those of earlier static models. A power-law relation connects the shielded c...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
Journal:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING More from this journal
Volume:
234
Pages:
52-58
Publication date:
1997-08-30
Event title:
11th International Conference on the Strength of Materials (ICSMA-11)
DOI:
ISSN:
0921-5093
Keywords:
Pubs id:
pubs:21916
UUID:
uuid:b7a76739-d052-4d3d-94de-62474364f068
Local pid:
pubs:21916
Source identifiers:
21916
Deposit date:
2012-12-19

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