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ICAMS Seminar by U. Krupp

21.06.2010

Prof. Dr.-Ing. Ulrich Krupp
Laborbereich Materialdesign und Werksto zuverlässigkeit
Fakultät Ingenieurwissenschaften und Informatik
FH Osnabrück - University of Applied Sciences

Mechanisms of Fatigue Crack Initiation and Propagation in Metallic Engineering Alloys at Very High Numbers of Cycles

Abstract: The majority of dynamically high-loaded components are designed by applying the total-life concept using Wöhler data. More recent research studies have shown that this kind of fatigue life assessment might be non-conservative, i.e., materials may fail beyond the "fatigue limit". Besides a general view on the Wöhler and the fracture mechanics concepts in structural integrity, the presentation will be focussed on the experimental correlation between the material's microstructure and the most relevant crack propagation mechanisms during fatigue loading at load levels close to the fatigue limit (high cycle fatigue and very high cycle fatigue, HCF and VHCF). The experimental results are discussed in terms of a mesoscopic modelling concept, where local plastic deformation at individual slip planes is treated by means of a boundary element approach.

The seminar takes place at 4:00 p.m. in the ICAMS seminar room UHW 11/1102, Stiepeler Straße 129, 44801 Bochum.

For further information contact Bernhard Eidel, bernhard.eidel@rub.de.

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