A discrete dislocation dynamics study aiming at understanding fatigue crack initiation

S Brinckmann, E Van der Giessen*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

21 Citaten (Scopus)
363 Downloads (Pure)

Samenvatting

We use discrete dislocation dynamics to build a model for fatigue crack initiation in a surface grain. Dislocations are modeled as line singularities in an elastic medium where they can be generated from pre-existing sources, glide or annihilate. The simulation reveals several features that can potentially give rise to fracture initiation. Three different potential areas of fracture-surface, grain interior and grain boundary-are found which correspond to those found in experiments. Comparison with experimental findings on crack nucleation is hampered by the computational expenses that limit the number of cycles that can be simulated. (C) 2004 Elsevier B.V. All rights reserved.

Originele taal-2English
Pagina's (van-tot)461-464
Aantal pagina's4
TijdschriftMaterials science and engineering a-Structural materials properties microstructure and processing
Volume387
Nummer van het tijdschrift2
DOI's
StatusPublished - 15-dec.-2004
Evenement13th International Conference on Strength of Materials (ICSMA 13) - , Hungary
Duur: 1-aug.-2003 → …

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