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Local assessment concepts for the structural durability of complexe loaded components

: Sonsino, Cetin Morris; Fischer, Gerhard

Sonsino, C.M. ; Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit -LBF-, Darmstadt; TU Darmstadt:
First Symposium on Structural Durability 2005. Proceedings : June 9-10, 2005, Darmstadt, Germany
Stuttgart: Fraunhofer IRB Verlag, 2005
ISBN: 3-8167-6788-5
ISBN: 978-3-8167-6788-6
Symposium on Structural Durability <1, 2005, Darmstadt>
Conference Paper
Fraunhofer LBF ()
low cycle fatigue strength; constant amplitude loading; contact fatigue; pressure vessel; gear

As fatigue damage is a local phenomenon, the design of components must put emphasis on local supportable stress/strain values. In critical areas of components, because of local stress/strain concentrations and appertaining stress/strain gradients, much higher local values can be allowed than the usual design data obtained with unnotched specimens. Only the knowledge of these local values can realize light-weight design exploiting the material limits.
Using component examples like pressure vessels, gears and wheel-hub assemblies, different variants of local concepts, i.e. strain and stress based methods, are presented for assessing their structural durability. For this, an interaction of numerical and experimental procedures, supported by experience, is necessary.