It is amazing that there is technology that can detect micro fractures and conditions in real time. In the pressure vessel world it seems that we build with multiple levels of safety factors and end up with some very over designed systems (of course weight is no an issue for us). I would think...
I see these very localized peek stresses "waved off" a lot (wouldn't be good practice for jet engines I imagine). Maybe the data to do the fatigue analysis is not generally available.
I am looking for some information on how to calculate fatigue life for materials at temperatures elevated into the creep realm. ASME Sec 8 Div 2 describes how to do this for carbon steel below 700F and stainless below 800F, but I am interested in temperatures > 1000F. I am performing an FEA...