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A study of the influence of grain boundaries on short crack growth during varying load using a dislocation technique
Division of Materials Engineering, Department of Mechanical Engineering, Lund University.ORCID iD: 0000-0002-7952-5330
Division of Solid Mechanics, Department of Mechanical Engineering, Lund University.
2004 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 71, no 15, p. 2215-2227Article in journal (Refereed) Published
Abstract [en]

The propagation of short cracks in the neighbourhood of grain boundaries have been investigated using a technique were the crack is modelled by distributed dislocation dipoles and the plastic deformation is represented by discrete dislocations. Discrete dislocations are emitted from the crack tip as the crack grows. Dislocations can also nucleate at the grain boundaries. The influence on crack growth characteristics of the distance between the initial crack tip and the grain boundary has been studied. It was found that crack growth rate is strongly correlated to the dislocation pile-ups at the grain boundaries. (C) 2004 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 2004. Vol. 71, no 15, p. 2215-2227
Keywords [en]
dislocation dipoles, discrete dislocations, short crack growth, grain boundary, dislocation nucleation
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:mau:diva-41338DOI: 10.1016/j.engfracmech.2003.10.006ISI: 000221991300007OAI: oai:DiVA.org:mau-41338DiVA, id: diva2:1538394
Available from: 2021-03-19 Created: 2021-03-19 Last updated: 2021-03-19Bibliographically approved

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Bjerkén, Christina

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