PSI - Issue 38

Isabel Huther et al. / Procedia Structural Integrity 38 (2022) 466–476 Huther et al./ Structural Integrity Procedia 00 (2021) 000 – 000

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Nomenclature t

plate thickness plate width yield stress

W

YS

UTS DIC

ultimate tensile strength Digital Image Correlation maximal in-service load

F n  n  l K t R m

nominal stress local stress

stress concentration factor at the weld toe

stress ratio

S-N curve slope parameter (Basquin's curve)

2. Specimen description The geometry of the longitudinal non-load carrying welded joints, in S355 steel grade, is described on Figure 1. The plate thickness is t = 8 mm and the plate width W = 80 mm. The mechanical characteristics of the plates are a yield stress (YS) equal to 436 MPa and an ultimate tensile strength (UTS) of 574MPa. The welded specimens are made by Nov BLM following the points described hereafter: • Weld depth equal to 4 mm to avoid the undercut on the gusset at the around ends, • Welding sequency adapted to the fact that the welder is right-handed: welding from B to A and from D to C in the ends, • Welding rod: CARBOFIL with protection gas: TERAL 23, to avoid weld splatter.

Figure 1 Specimen plan and welding process description.[5]