Parameter estimation of a high-cycle fatigue model combining the Ottosen-Stenström-Ristinmaa approach and Lemaitre-Chaboche damage rule

Osmo Kaleva, Heikki Orelma, Dmitriy Petukhov

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Abstract

This paper deals with the continuum approach to the high-cycle fatigue model introduced by Ottosen et al. equipped with the damage rule of Lemaitre and Chaboche. The main result is that model parameters K and γ are not identifiable based on lifetime data. However, with observations from a fatigue development profile, it is possible to estimate also the γ-parameter. Moreover, the model gives the same lifetime for all γ⩾0. These results are elucidated with examples.

Original languageEnglish
Article number106153
Number of pages7
JournalInternational Journal of Fatigue
Volume147
DOIs
Publication statusPublished - Jun 2021
Publication typeA1 Journal article-refereed

Keywords

  • Continuum mechanics-based model
  • Damage evolution
  • High-cycle fatigue
  • Lemaitre-Chaboche damage rule

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Modelling and Simulation
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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