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Modeling the lifetime reduction due to the superposition of TMF and HCF loadings in cast iron alloys
- The superposition of small amplitude, high frequency loading cycles (HCF) to slow, large amplitude loading cycles (TMF) can significantly reduce the fatigue life. In this work, the combined TMF+HCF loading has been experimentally investigated for a cast iron alloy. In particular, the influence of the HCF frequency of the HCF amplitude and of the location of the superposed HCF cycles has been assessed. It was observed that the HCF frequency has a limited impact on the TMF fatigue life. On the other side, the HCF-strain amplitude has a highly non-linear influence on the TMF fatigue life. A simple estimate for the fatigue life reduction due to the superposed HCF cycles has been derived from fracture mechanics considerations. It is assumed that the number of propagation cycles up to failure can be neglected after a threshold for the HCF loading has been reached. The model contains only two adjustable parameters and can be combined with any TMF life prediction model. The model predictionsThe superposition of small amplitude, high frequency loading cycles (HCF) to slow, large amplitude loading cycles (TMF) can significantly reduce the fatigue life. In this work, the combined TMF+HCF loading has been experimentally investigated for a cast iron alloy. In particular, the influence of the HCF frequency of the HCF amplitude and of the location of the superposed HCF cycles has been assessed. It was observed that the HCF frequency has a limited impact on the TMF fatigue life. On the other side, the HCF-strain amplitude has a highly non-linear influence on the TMF fatigue life. A simple estimate for the fatigue life reduction due to the superposed HCF cycles has been derived from fracture mechanics considerations. It is assumed that the number of propagation cycles up to failure can be neglected after a threshold for the HCF loading has been reached. The model contains only two adjustable parameters and can be combined with any TMF life prediction model. The model predictions are compared with the test results for a large range of TMF+HCF loading conditions.…
Autor*innen: | Bernard FedelichORCiD, Hans-Joachim Kühn, Birgit RehmerORCiD, Birgit SkrotzkiORCiD |
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Persönliche Herausgeber*innen: | Francesco Iacoviello |
Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Procedia Structural Integrity |
Jahr der Erstveröffentlichung: | 2016 |
Veröffentlichende Institution: | Bundesanstalt für Materialforschung und -prüfung (BAM) |
Verlag: | Elsevier |
Verlagsort: | Radarweg 29, 1043 NX Amsterdam, The Netherlands, |
Jahrgang/Band: | 2 |
Erste Seite: | 2190 |
Letzte Seite: | 2197 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Thermomechanical Fatigue (TMF); High Cycle Fatigue (HCF); Cast iron; Fatigue assessment |
Veranstaltung: | 21st European Conference on Fracture, ECF21 |
Veranstaltungsort: | Catania, Italy |
Beginndatum der Veranstaltung: | 20.06.2016 |
Enddatum der Veranstaltung: | 24.06.2016 |
DOI: | doi:10.1016/j.prostr.2016.06.274 |
URN: | urn:nbn:de:kobv:b43-369550 |
Verfügbarkeit des Dokuments: | Datei für die Öffentlichkeit verfügbar ("Open Access") |
Lizenz (Deutsch): | Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung |
Datum der Freischaltung: | 25.07.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 22.06.2017 |
Schriftenreihen ohne Nummerierung: | Wissenschaftliche Artikel der BAM |