TIG-dressing of High Strength Butt Welded Connection. Part 2: Physical Testing and Modelling

TIG-dressing of High Strength Butt Welded Connection. Part 2: Physical Testing and Modelling

Van Es, S.H.J.
Kolstein, M.H.
Pijpers, R.J.M.
Bijlaard, F.S.K.

Civil Engineering and Geosciences

Structural Engineering

2014-02-06

Weld improvement techniques are aimed at reducing the notch effects of welds and generally focus on two aspects: a change of geometry of the weld toe and a change of the weld residual stresses. In this paper, fatigue tests are discussed, performed on butt welded specimens in steel grades ranging from S460 to S1100 in the TIG-dressed condition. The test results are compared with modelled fatigue strength according to the notch stress theory and similar specimens in the as-welded condition. The changed notch geometry of the joints is based on the results of a parallel program of weld toe geometry measurements. The individual data points and their failure mode give good qualitative insight in the effect of TIG-dressing on butt welded joints in high strength steel. Overall, a positive effect of TIG-dressing on the weld toe is visible. On the basis of a large dataset of measured weld toe geometries a model has been developed based on the notch stress theory. The theoretical results of the model are compared with the results of the physical tests, showing significant differences between the model and the fatigue tests.

TIG-dressing
butt weld
notch stress approach
fatigue testing

http://resolver.tudelft.nl/uuid:df8af442-b324-47ba-bb3a-e58314040b0d

https://doi.org/10.1016/j.proeng.2013.12.068

Elsevier

1877-7058

Procedia Engineering, 66, 2013; 5th Fatigue Design Conference, Fatigue Design 2013

Institutional Repository

journal article

© 2013 The Authors
Open access under CC BY-NC-ND license