A phase field model for high-cycle fatigue: Total-life analysis

Alireza Golahmar, Christian F. Niordson, Emilio Martínez-Pañeda*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

We present a generalised phase field formulation for predicting high-cycle fatigue in metals. Different fatigue degradation functions are presented, together with new damage accumulation strategies, to account for (i) a typical S–N curve slope, (ii) the fatigue endurance limit, and (iii) the mean stress effect. The numerical implementation exploits an efficient quasi-Newton monolithic solution strategy and Virtual S–N curves are computed for both smooth and notched samples. The comparison with experiments reveals that the model can accurately predict fatigue lives and endurance limits, as well as naturally capture the influence of the stress concentration factor and the load ratio.
Original languageEnglish
Article number107558
JournalInternational Journal of Fatigue
Volume170
Number of pages13
ISSN0142-1123
DOIs
Publication statusPublished - 2023

Keywords

  • Fatigue
  • Finite element method
  • Phase field
  • S–N curves
  • Total-life analysis

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