Nachweiskonzepte zur Bemessung ermüdungsbeanspruchter Bauteile unter Berücksichtigung von Schweißnahtnachbehandlungsverfahren durch höherfrequentes Hämmern

Fatigue design concepts for post-weld treated joints improved by high frequency hammer peening methods.

Post-weld improvement methods have been widely investigated and have in most cases been found to give substantial increases in the fatigue strength. Nowadays, there is an increasing interest in using such methods in order to either improve the fatigue resistance of new structures built e.g. by high strength steel and/or to enlarge the lifetime of existing structures suffering from fatigue problems. With regard to this, post-weld improvement using high frequency hammer peening methods lately showed very good and promising results in combination with simple operation conditions.
However, the successful application of post-weld improvement methods always requires the existence of profound fatigue design concepts as well as relevant execution and quality standards. The following paper refers predominately to the first aspect, in trying to summarise and compare existing design concepts and their application range for high frequency hammer peening methods.