A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of residual stresses on the fatigue behaviour of welded beams
The aim of this research was to study the effect which residual stresses have on the fatigue behaviour of specimen of high strength structural steel after welding. Specimen of the high strength structural steel S355J2G3 and S890QL were dynamically loaded under alternating loading. The residual stresses were measured before and after the loading. In order to determine the effect of residual stresses for both kinds of steel two different welding sequences were adopted, so that residual stresses of different amounts were induced at the toe of the butt welds. The loaded beams present S-N curves, which are in accordance with the IIW rules, but there is no difference between the specimen with high residual stresses and that with low residual stresses, indeed the residual stresses were measured after the loading and no relaxation was found. By observing the fracture surface it was clear to see that the fracture initiated in proximity of the welding defects of the fillet weldings. The residual stresses seemed to have no influence on the fatigue behaviour of the beams so that it was possible to conclude that it is not important the welding sequence which is used or eventually post-welding treatments in order to reduce residual stresses but the quality of the fillet weld.
Influence of residual stresses on the fatigue behaviour of welded beams
The aim of this research was to study the effect which residual stresses have on the fatigue behaviour of specimen of high strength structural steel after welding. Specimen of the high strength structural steel S355J2G3 and S890QL were dynamically loaded under alternating loading. The residual stresses were measured before and after the loading. In order to determine the effect of residual stresses for both kinds of steel two different welding sequences were adopted, so that residual stresses of different amounts were induced at the toe of the butt welds. The loaded beams present S-N curves, which are in accordance with the IIW rules, but there is no difference between the specimen with high residual stresses and that with low residual stresses, indeed the residual stresses were measured after the loading and no relaxation was found. By observing the fracture surface it was clear to see that the fracture initiated in proximity of the welding defects of the fillet weldings. The residual stresses seemed to have no influence on the fatigue behaviour of the beams so that it was possible to conclude that it is not important the welding sequence which is used or eventually post-welding treatments in order to reduce residual stresses but the quality of the fillet weld.
Influence of residual stresses on the fatigue behaviour of welded beams
Quadrini, E. (author) / Bergmann, J.P. (author) / Nitschke-Pagel, T. (author) / Wohlfahrt, H. (author)
1998
10 Seiten, 7 Quellen
Conference paper
English
Effects of residual stresses on the fatigue behaviour of welded steel structures
| Tema Archive | 2005
Effects of residual stresses on the fatigue behaviour of welded steel structures
| British Library Online Contents | 2005
Fatigue crack growth in a welded rail under the influence of residual stresses
| British Library Online Contents | 2005
Fatigue Life Evaluation Model for Welded Joints with Residual Stresses
| British Library Online Contents | 2005
| British Library Conference Proceedings | 1997