A1 Journal article (refereed), original research

Effects of weaving technique on the fatigue strength of transverse loaded fillet welds made of ultra-high-strength steel


Publication Details
Authors: Skriko T, Björk T, Nykänen T, Skriko T
Publisher: Springer
Publication year: 2014
Language: English
Related Journal or Series Information: Welding in the World
Volume number: 58
Issue number: 3
ISSN: 0043-2288
eISSN: 1878-6669
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract
The effect of weaved weld toe geometry on the fatigue strength of S960 steel grade fillet welds has been studied by means of experimental testing and finite element analysis. The comparisons have been made between normal straight weld toe lines and weaved weld toe lines by using the weld toe radius and structural hot spot FAT value as reference values. The effective notch stress approach was utilized to conduct FE analyses on weaved weld toe geometry and the results were compared with the experimental results. The FE analysis showed quite good agreement with the experimental test results, although residual stresses or HAZ softening in welded joint were not included in the modeling. The experimental tests also indicated that it is possible to achieve high fatigue properties for UHSS fillet welded joints without any post-weld treatments. By taking account all the essential factors – joint geometry, welding metallurgy and residual stresses – the reached fatigue strength of UHSS weldments can be much higher than normal fatigue resistance values presented in standards and recommendations.

Last updated on 2018-22-10 at 12:50