Effect of heat from weld on fatigue in steel - after the weld has gone
Effect of heat from weld on fatigue in steel - after the weld has gone
(OP)
I am looking at fatigue in a UB member that had a plate welded across the flange, but was subsequently taken away. In accordance with EN 1993-1-9 this would be treated as Detail Category 50 for calculating the fatigue damage with the plate in place.
However, as the plate has been removed and the welds grinded off there will not be a stress concentration due to the plate (Detail Cat. 50). I assume there would be some reduction in allowable stress in the member due to residual stresses from the localised heat from the welding process. My questions are:
1. Is this assumption correct?
2. How can any reduction be quantified?
Many thanks,
Chris
However, as the plate has been removed and the welds grinded off there will not be a stress concentration due to the plate (Detail Cat. 50). I assume there would be some reduction in allowable stress in the member due to residual stresses from the localised heat from the welding process. My questions are:
1. Is this assumption correct?
2. How can any reduction be quantified?
Many thanks,
Chris





RE: Effect of heat from weld on fatigue in steel - after the weld has gone
RE: Effect of heat from weld on fatigue in steel - after the weld has gone
The member is subject to a fully reversible load so each flange will see both compression and tension. The weld was applied when the frame was unloaded (except for dead weight).
RE: Effect of heat from weld on fatigue in steel - after the weld has gone