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BY 4.0 license Open Access Published by De Gruyter September 26, 2018

On the estimation of cyclic material properties – Part 2: Introduction of a new estimation method

Dedicated to Professor Dr.-Ing. Harald Zenner on the occasion of his eightieth birthday

Zur Abschätzung zyklischer Werkstoffkennwerte – Teil 2: Einführung einer neuen Abschätzmethode
Michael Wächter and Alfons Esderts
From the journal Materials Testing

Abstract

In the first part of this paper, a large variety of methods for estimating cyclic material properties from quasi-static material properties were rated concerning their accuracy. For this, a massive database containing test results from quasi-static and cyclic tests has been gathered and used to compare estimated and experimental properties. In this second part of the paper, the experience of how different estimation methods work and the database itself are used to develop a new estimation method, the so-called FKM method. This new method is able to estimate cyclic material properties for steel, cast steel and wrought aluminum and thus exceeds the known estimation methods if the quality criteria from part 1 are applied.

Kurzfassung

Anhand einer großen Datenbasis mit Ergebnissen quasi-statischer und dehnungsgeregelter Versuche wird eine neue Methode zur Abschätzung zyklischer Werkstoffkennwerte für die Werkstoffgruppen Stahl, Stahlguss und Aluminiumknetlegierungen, die sog. FKM-Methode, abgeleitet. Die neue Methode benötigt lediglich die Zugfestigkeit als Eingabewert, weist einen größeren Gültigkeitsbereich als andere, bekannte Methoden auf und übertrifft gleichzeitig deren Schätzgüte.


*Correspondence Address, Dr.-Ing. Michael Wächter, Institut für Maschinelle Anlagentechnik, und Betriebsfestigkeit, TU Clausthal, Leibnizstraße 32, 38678 Clausthal-Zellerfeld, Germany, E-mail:

Dr.-Ing. Michael Wächter, born in 1986, studied Mechanical Engineering at Clausthal University of Technology (TUC), Germany and has been a scientific employee at the Institute for Plant Engineering and Fatigue Analysis (IMAB) of TUC since 2011. He finished his PhD thesis on the determination of cyclic material properties and S-N curves for damage parameters in 2016.

Professor Dr.-Ing. Alfons Esderts, born in 1963, studied Mechanical Engineering at Clausthal University of Technology (TUC), Germany and finished his PhD thesis in 1995. Between 1995 and 2003 he was head of the “Fatigue Analysis” department at Deutsche Bahn AG in Minden, Germany. Since 2003 he has been a professor at TUC and the head of the Institute for Plant Engineering and Fatigue Analysis (IMAB) at TUC. In addition, he has been vice president for research and technology transfer at TUC since 2015.


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Published Online: 2018-09-26
Published in Print: 2018-10-27

© 2018, Carl Hanser Verlag, München

This work is licensed under the Creative Commons Attribution 4.0 International License.

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