Fatigue Design/welds
Fatigue Design/welds
(OP)
In short, is it fair to say that designing welds for fatigue involves first designing the weld for static loading, then ensuring that the weld stress is below the fatigue design stress range?
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RE: Fatigue Design/welds
A clear conscience is usually the sign of a bad memory
RE: Fatigue Design/welds
Is that a yes, kinda?
RE: Fatigue Design/welds
Whatever the fatigue design stress range is? It will most always be less than the allowable static stress in the weld. It is also fair to say that a weld line parallel to a stress field will always fair better than a weld line across the stress field, because of the potential stress raisers the latter introduces across the stress field. Good clean design and detailing to keep the stresses flowing smoothly is all important in minimizing stress concentrations, which invariably widen the stress range. No abrupt section changes, no reentrant corners, no weld imperfections, etc. etc.
RE: Fatigue Design/welds
I guess that is why I am asking....I think I may be brain- farting here, but, say in the case of a welded plate girder- one would think the design of the bottom flange-to-web weld would only involve the static load case (even in designing for fatigue) unless there was a stress reversal, no?
RE: Fatigue Design/welds