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Thermomechanical fatigue crack initiation in disc alloys using a damage approach
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Univ Nottingham, England.
Univ Nottingham, England.
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2018 (English)In: 12TH INTERNATIONAL FATIGUE CONGRESS (FATIGUE 2018), E D P SCIENCES , 2018, Vol. 165, article id 19007Conference paper, Published paper (Refereed)
Abstract [en]

A fatigue crack initiation model based on damage accumulation via a fatigue memory surface in conjunction with a plastic strain energy parameter was evaluated for thermomechanical fatigue loading in a gas turbine disc alloy. The accumulated damage in each hysteresis loop was summed up, and it was assumed that the damage at the stable state is repeated until failure occurs. Crack initiation occurs when enough fatigue damage has been obtained, and the number of cycles can thus be directly determined. The fatigue damage is highly coupled to the constitutive behaviour of the material, where the constitutive behaviour was modelled using a non-linear hardening description. Based on this, a stable state was achieved and the obtained damage could be extracted. A user-defined material subroutine was implemented, incorporating both the constitutive description and the fatigue damage accumulation. The framework was adopted in a finite element context to evaluate the thermomechanical fatigue crack initiation life of the disc alloy RR1000. From the evaluation it could be seen that a good prediction of the thermomechanical fatigue life was achieved compared to performed experiments.

Place, publisher, year, edition, pages
E D P SCIENCES , 2018. Vol. 165, article id 19007
Series
MATEC Web of Conferences, ISSN 2261-236X
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:liu:diva-159903DOI: 10.1051/matecconf/201816519007ISI: 000478990600172OAI: oai:DiVA.org:liu-159903DiVA, id: diva2:1346106
Conference
12th International Fatigue Congress (FATIGUE)
Note

Funding Agencies|Clean Sky 2 Joint Undertaking under the European Union [686600]

Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-27

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Leidermark, DanielEriksson, RobertStekovic, Svjetlana
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf