Parameter estimation of a high-cycle fatigue model combining the Ottosen-Stenström-Ristinmaa approach and Lemaitre-Chaboche damage rule
Kaleva, Osmo; Orelma, Heikki; Petukhov, Dmitriy (2021-06)
Kaleva, Osmo
Orelma, Heikki
Petukhov, Dmitriy
06 / 2021
International Journal of Fatigue
106153
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202107096267
https://urn.fi/URN:NBN:fi:tuni-202107096267
Kuvaus
Peer reviewed
Tiivistelmä
<p>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.</p>
Kokoelmat
- TUNICRIS-julkaisut [20689]