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Cyclic material behaviour of welded ultra high-strength steels

 
: Möller, Benjamin; Wagener, Rainer; Melz, Tobias

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Onate, E. ; European Community on Computational Methods in Applied Science -ECCOMAS-; Spanish Association for Numerical Methods in Engineering -SEMNI-; International Center for Numerical Methods in Engineering -CIMNE-:
11th World Congress on Computational Mechanics, WCCM 2014. Proceedings. Online resource : 5th European Conference on Computational Mechanics (ECCM V); 6th European Conference on Computational Fluid Dynamics (ECFD VI); 20 - 25 July 2014, Barcelona, Spain
Barcelona, 2014
http://congress.cimne.com/iacm-eccomas2014/frontal/ProgTodo.asp
ISBN: 978-84-942844-7-2
2 S.
World Congress on Computational Mechanics (WCCM) <11, 2014, Barcelona>
European Conference on Computational Mechanics (ECCM) <5, 2014, Barcelona>
European Conference on Computational Fluid Dynamics (ECFD) <6, 2014, Barcelona>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer LBF ()
cyclic material behaviour; ultra high-strength steel; steel; material

Abstract
A crucial issue within the field of crane structures is the fatigue life of welded ultra high-strength fine-grained steels, which are widely used in order to achieve increasing carrying capacities and to enable lightweight design. The typical fatigue behaviour of highly loaded truck and crawler cranes is related to the low cycle fatigue (LCF) regime and often focused on critical details of welded joints. Fatigue recommendations for the design and analysis of welded structures [1, 2] are based on fatigue resistance Wöhler curves irrespective of the steel grade and describe the LCF behaviour improperly. Latest stress-controlled experiments on large scale, butt-welded specimens describe the overall S-N relation of such structural elements in the LCF and HCF regime [3], but do not describe the mechanisms leading to fatigue of welded ultra high-strength steels accurately – especially in case of variable amplitude loading.

: http://publica.fraunhofer.de/dokumente/N-311341.html