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Lifetime prediction of cast iron materials under combined thermomechanical fatigue and high cycle fatigue loading using a mechanism-based model

  • In this paper the fatigue life of three cast iron materials, namely EN-GJS-700, EN-GJV-450 and EN-GJL-250, is predicted for combined thermomechanical fatigue and high cycle fatigue loading. To this end, a mechanism-based model is used, which is based on microcrack growth. The model considers crack growth due to low frequency loading (thermomechanical and low cycle fatigue) and due to high cycleIn this paper the fatigue life of three cast iron materials, namely EN-GJS-700, EN-GJV-450 and EN-GJL-250, is predicted for combined thermomechanical fatigue and high cycle fatigue loading. To this end, a mechanism-based model is used, which is based on microcrack growth. The model considers crack growth due to low frequency loading (thermomechanical and low cycle fatigue) and due to high cycle fatigue. To determine the model parameters for the cast iron materials, fatigue tests are performed under combined loading and crack growth is measured at room temperature using the replica technique. Superimposed high cycle fatigue leads to an accelerated crack growth as soon as a critical crack length and thus the threshold stress intensity factor is exceeded. The model takes this effect into account and predicts the fatigue lives of all cast iron materials investigated under combined loadings very well.show moreshow less

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Metadaten
Author:Mario Metzger, Britta Nieweg, Christoph Schweizer, Thomas SeifertORCiDGND
Publisher:Elsevier
Place of publication:Oxford
Year of Publication:2013
Language:English
GND Keyword:Ermüdung; Stahl; Thermomechanik
Parent Title (English):International Journal of Fatigue Proceedings of the 2nd International Workshop on Thermo-Mechanical Fatigue 2011
Volume:53
ISSN:0142-1123
First Page:58
Last Page:66
Document Type:Conference Proceeding
Open Access:Frei zugänglich
Institutes:Bibliografie
Release Date:2018/12/18
Licence (German):License LogoEs gilt das UrhG
DOI:https://doi.org/10.1016/j.ijfatigue.2012.02.007