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Branching of a dissolution driven stress corrosion crack
Malmö högskola, School of Technology (TS).ORCID iD: 0000-0002-7952-5330
2009 (English)In: Proceedings of the International Conference on Crack Paths 2009, European Structural Integrity Society , 2009Conference paper, Published paper (Other academic)
Abstract [en]

Stress corrosion cracking occurs due to the synergistic interaction between mechanical load and corrosion reactions. Some types of stress corrosion crack branch heavily. Here, branching during dissolution driven crack growth is studied using an adaptive FE method. A strain-assisted evolution law is used for the inherently blunted crack. No criterion for crack growth is needed as for a sharp crack, neither for the growth direction. Several simulations are performed with different degrees of load biaxiality. It is found that large biaxiality promotes branching, but no conditions for when branching takes place is found. Instead, branching seems to occur rather randomly due to the perturbation sensitivity of a dissolution driven crack. Also crack growth rates for branched cracks are investigated, and it is found that both constant growth rates can be reached, as well as decreasing rates and eventual arrest. The cracks follow a mode I crack path, however local changes may occur due to the perturbation sensitivity.

Place, publisher, year, edition, pages
European Structural Integrity Society , 2009.
Keywords [en]
crack path, branching, stress corrosion, surface evolution
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:mau:diva-12771Local ID: 9026OAI: oai:DiVA.org:mau-12771DiVA, id: diva2:1409818
Conference
International Conference on CRACK PATHS (CP), Vicenza, Italy (2009)
Available from: 2020-02-29 Created: 2020-02-29 Last updated: 2022-06-27Bibliographically approved

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http://www.cp2009.unipr.it/

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Bjerkén, Christina

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