A discrete dislocation dynamics study aiming at understanding fatigue crack initiation

S Brinckmann; E Van der Giessen

doi:10.1016/j.msea.2004.01.142

A discrete dislocation dynamics study aiming at understanding fatigue crack initiation

S Brinckmann, E Van der Giessen^*

^*Bijbehorende auteur voor dit werk

Onderzoeksoutput › Academic › peer review

21 Citaten (Scopus)

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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-2	English
Pagina's (van-tot)	461-464
Aantal pagina's	4
Tijdschrift	Materials science and engineering a-Structural materials properties microstructure and processing
Volume	387
Nummer van het tijdschrift	2
DOI's	https://doi.org/10.1016/j.msea.2004.01.142
Status	Published - 15-dec.-2004
Evenement	13th International Conference on Strength of Materials (ICSMA 13) - , Hungary Duur: 1-aug.-2003 → …

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10.1016/j.msea.2004.01.142

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abstract = "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.",

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AB - 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.

KW - dislocation

KW - fatigue initiation

U2 - 10.1016/j.msea.2004.01.142

DO - 10.1016/j.msea.2004.01.142

M3 - Article

VL - 387

SP - 461

EP - 464

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

SN - 0921-5093

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T2 - 13th International Conference on Strength of Materials (ICSMA 13)

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