Abstract
A large variety of methods for estimating cyclic material properties from quasi-static material properties can be found throughout the literature. Therefore, the user usually faces the problem of determining which methods would best suit his purpose. To help answer this question, a massive database containing test results from quasi-static and cyclic tests is gathered and used for a quality rating of the different methods. This rating results in the recommendation to use the uniform material law for steel materials, the modified park-song's method for wrought aluminum and the method of variable slopes 2006 for thin steel sheets. In addition, the accuracy of these estimation methods is compared to experimental results using deviation ranges in the total strain life curve and in the cyclic stress-strain curve.
Kurzfassung
In der Literatur lässt sich eine große Anzahl von Methoden zur Abschätzung zyklischer Werkstoffkennwerte basierend auf quasistatischen Werkstoffkennwerten finden. Hierdurch gerät der Anwender in die Situation nicht zu wissen, welche dieser Methoden er verwenden soll. Um ihn bei der Beantwortung dieser Frage zu unterstützen, wurde eine große Datenbasis mit Ergebnissen quasistatischer und zyklischer Versuche zusammengetragen und mit ihr die Güte der verschiedenen Schätzmethoden bewertet. Diese Bewertung führt zu der Empfehlung, das Uniform Material Law für Stahlwerkstoffe, die Modified Park-Song's Method für Aluminiumknetlegierungen und die Method of variable Slopes 2006 für dünne Stahl-Feinbelche zu verwenden. Außerdem wird die Güte dieser Abschätzmethoden mit der Güte experimenteller Ergebnisse mithilfe der Streuspanne für die Gesamtdehnungswöhlerlinie sowie die zyklische Spannungs-Dehnungs-Kurve verglichen.
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