Finite element programs use an extrapolation method to calculate stresses at nodes (from stresses at integration points). this extrapolation some times gives higher results than expexted. I suggest to use values of stresses at integration points or use finer mesh at your interest position.
Dear Donholte
I am familiar with russian nuclear pressure vessel design code (that is like ASME III) and like ASME, I think there is a little difference between nuclear and non nuclear codes (as you know difference between design procedure of ASME VIII Div 2 and ASME III is not so much).
the...
Refer to MEGEYSY Pressure vessel handbook. in this handbook there is relationships for analyzing saddles and there are some factors for non 360 degree rings.
yes, It can but locally. in general it is the responsibility of the owner to decide the level of plasticity that may occure. for example I saw a reactor that LOCA condition was treated as LEVEL C, instead of level D.
