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Consideration of influence factors between small-scale specimens and large components on the fatigue strength of thin-plated block joints in shipbuilding
Publikationstyp
Journal Article
Date Issued
2013-11-20
Sprache
English
Author(s)
Fricke, Wolfgang
TORE-URI
Volume
36
Issue
12
Start Page
1223
End Page
1231
Citation
Fatigue and Fracture of Engineering Materials and Structures 12 (36): 1223-1231 (2013)
Publisher DOI
Scopus ID
Publisher
Wiley-Blackwell
Shipbuilding in blocks, as being usual on all larger shipyards, requires that the blocks will finally be welded together manually or semi-automatically, that is, with butt-welds in transverse direction that have to withstand relatively high dynamical loads. Modern shipbuilding aims at lightweight construction with thin plates that may have a plate thickness down to 4 mm. Previous investigations showed that manually produced butt-welds in such thin structures did not reach the calculated fatigue life as required in the rules. Up to the present, this problem has not yet been solved, and it is questioned if all influence factors on the fatigue behaviour of real structures are correctly considered as no damage cases at butt joints that are known yet. In the investigation described here, results from small-scale specimens tested with cyclic loads will be transferred to large components, considering the effects of recorded pre-deformations induced by welding as well as measured differences in residual stresses between small-scale specimens and large components, thus clarifying how far for instance a detrimental stress ratio should be taken into account by the rules for thin plates. © 2013 Wiley Publishing Ltd.
Subjects
3D analysis
fatigue of welds
fatigue testing
residual stress
ship steels
size effect
DDC Class
600: Technik
620: Ingenieurwissenschaften
More Funding Information
Deutschland, Bundesamt für Wehrtechnik und Beschaffung (BWB)