Extension of the strain energy density method for fatigue assessment of welded joints to sub-zero temperatures

Publikationstyp
Journal Article
Date Issued
2020-07-26
Sprache
English
Author(s)
Braun, Moritz  orcid-logo
Fischer, Claas  
Fricke, Wolfgang 
Ehlers, Sören  
Institut
Konstruktion und Festigkeit von Schiffen M-10  
TORE-DOI
10.15480/882.3062
TORE-URI
http://hdl.handle.net/11420/7701
Journal
Fatigue & fracture of engineering materials & structures  
Volume
43
Issue
12
Start Page
2867
End Page
2882
Citation
Fatigue and Fracture of Engineering Materials and Structures 12 (43): 2867-2882 (2020-12-01)
Publisher DOI
10.1111/ffe.13308
Scopus ID
2-s2.0-85088423690
Publisher
Wiley-Blackwell
Within stress-based fatigue assessment concepts, causes that do not influence the fatigue stress parameters, such as temperature, can only be accounted for by means of modification factors. The strain energy density (SED) method allows to account for changing material support effects and Young's modulus with temperature directly. Thus, in this study, a concept is presented to extend the SED method for fatigue assessment of welded joints at sub-zero temperatures. For this purpose, fatigue test results of welded joints made from normal and high-strength structural steel are assessed in the range of 20°C down to −50°C. The results are evaluated based on the formula that is used to derive the SED control radii of welded joints and compared with results of studies on SED-based assessment of notched components at high temperatures. From the estimates of the control radii, a temperature modification function for SED is derived for design purposes.
Subjects
high-strength steel
low temperatures
strain energy density
temperature dependence of fatigue curves
weldment fatigue
DDC Class
600: Technik
Funding(s)
MarTERA - FATICE - Experimentelle, analytische und numerische Untersuchungen zur Betriebsfestigkeit unter variabler Belastung infolge Seegangs- und Eislasten  
Ermüdungsfestigkeit von Schweißverbindungen bei Minusgraden  
Projekt DEAL  
More Funding Information
The work was funded by the German Federal Ministry for Economic Affairs and Energy (Bundesministerium für Wirtschaft und Energie BMWi) in the framework of MarTERA ERA-NET Cofound scheme (MarTERA – FATICE (03SX465B)).
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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