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Multiaxial fatigue life and strength criteria for non-proportional loading*

Published/Copyright: May 28, 2013
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Abstract

In the article a proposal of loading non-proportionality measure H for sinusoidal biaxial loading has been presented. On the basis of non-proportionality measure, there has been proposed a bending and torsional fatigue strength, with a phase shift of components and the mean value has been proposed. Moreover, a high-cycle fatigue life criterion based on the same non-proportionality measure has been proposed. The predictive capability of both criteria were demonstrated by analysing experimental results from the literature. The predicted results are generally in good agreement with the experimental ones.

Kurzfassung

Im vorliegenden Beitrag wird ein Ansatz für die Messung der nicht-proportionalen sinusförmigen multiaxialen Beanspruchung vorgestellt. Auf der Basis der nicht-proportionalen Messung wird ein Kriterium für die Ermüdungsfestigkeit bei Biegung und Torsion propagiert unter Angabe der Phasenverschiebung von Komponenten und des Hauptwertes. Darüber hinaus wird ein Lebensdauerkriterium für hochfrequente Ermüdung basierend auf derselben nicht-proportionalen Messung propagiert. Die Vorhersagbarkeit beider Kriterien wird durch die Analyse von Literaturangaben demonstriert. Die vorhergesagten Ergebnisse stimmen mit den experimentellen Ergebnissen überein.


Dr. eng. Dariusz Skibicki obtained his basic education in the area of mechanical engineering at the University of Technology in Bydgoszcz in 1992. He started to work on multiaxial fatigue of materials in 2000 and defended his Ph. D. After receiving the doctorate degree, his scope of interest has been enlarged by encompassing the fatigue of materials with problems of defining non-proportionality measures. Now he is assistant professor at the University of Bydgoszcz in Poland, where in the range of education he deals mainly with CAD problems.

*

Contribution to the 7th International Conference on Biaxial/Multiaxial Fatigue and Fracture (7ICBMFF)


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Published Online: 2013-05-28
Published in Print: 2006-03-01

© 2006, Carl Hanser Verlag, München

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