Title
TIG-dressing of high strength butt welded connection - Part 2: Physical testing and modelling
Author
van Es, S.H.J.
Kolstein, M.H.
Pijpers, R.J.M.
Bijlaard, F.S.K.
Publication year
2013
Abstract
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.
Subject
Building Engineering & Civil Engineering
SR - Structural Reliability
TS - Technical Sciences
Buildings and Infrastructure
Architecture
Built Environment
TIG-dressing
Butt weld
Notch stress approach
Fatigue testing
To reference this document use:
http://resolver.tudelft.nl/uuid:2cb4eb5a-da4e-4222-a76a-10ec55af5f30
TNO identifier
488063
Source
Procedia Engineering, 66, 126-137
Document type
article