Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures. (September 2020)

• Record Type: Journal Article
• Authors: Braun, Moritz; Milaković, Aleksandar-Saša; Renken, Finn; Fricke, Wolfgang; Ehlers, Sören
• Is Part Of: International journal of fatigue. Volume 138(2020)
• Publication Date: 2020-09
• Subjects: Low temperature fatigue -- Fatigue assessment methods -- Finite elements -- Structural hot spot stress -- Effective notch stress; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2020.105672
• Languages: English
• ISSNs: 0142-1123

Abstract

Graphical abstract: Highlights: Analysis of fatigue strength data for temperatures ranging from 20 °C to −50 °C. Comparison of weld toe and root failure assessment methods at sub-zero temperatures. Modification factors for local fatigue assessment methods for sub-zero temperatures. Abstract: Several studies have found significant increase in the fatigue strength of welded joints of structural steels at sub-zero temperatures. This study addresses the research by investigating the applicability of local fatigue assessment methods to welded joints exposed to sub-zero temperatures. For this purpose, fatigue test results of two fillet weld details with weld toe and weld root failure are evaluated at a range of temperatures using a variety of structural hot-spot and notch stress approaches, then are compared to the nominal stress approach. Large differences in prediction accuracy are found for the analysed assessment methods and both failure locations.