ASME VIII Div 2- ? 1 + ?2 + ?3 ? 4S
ASME VIII Div 2- ? 1 + ?2 + ?3 ? 4S
(OP)
Gentlemen - can you help explain ASME Section VIII, Div. 2 Section 5.3.2 required of σ 1 + σ2 + σ3 ≤ 4S.
I have a Square nozzle with rounded corners on a vessel that has been evaluated using finite element methods(NASTRAN). Maximum stresses occur in a few elements at the radius corners in the shell.
All Pm,Pl + Pb, and Pl+Pb+Q limits have been satisfied.
When performing the σ 1 + σ2 + σ3 ≤ 4S check do I use only the primary stresses (Pl and Pb) to calculate each of the 3 direction principle stresses or do I used the primary + secondary stresses (pl + Pb + Q) for this check.?.
Thanks in advance for any help you can provide"
Paul
I have a Square nozzle with rounded corners on a vessel that has been evaluated using finite element methods(NASTRAN). Maximum stresses occur in a few elements at the radius corners in the shell.
All Pm,Pl + Pb, and Pl+Pb+Q limits have been satisfied.
When performing the σ 1 + σ2 + σ3 ≤ 4S check do I use only the primary stresses (Pl and Pb) to calculate each of the 3 direction principle stresses or do I used the primary + secondary stresses (pl + Pb + Q) for this check.?.
Thanks in advance for any help you can provide"
Paul





RE: ASME VIII Div 2- ? 1 + ?2 + ?3 ? 4S