ASME-Sec.VII-Div.2-Part 5

[Sajjad2164]

Hello.
I am running an elastic analysis according to ASME-Sec.VII-Div.2-Part 5. I want to check the hydrostatic test condition and make sure if the vessel met the requirements or not. In the stress limits, there are limits for Pm, Pb, and Pm+Pb. I'd like to know if it means that I should evaluate stress at locations away from discontinuities or not.
The other issue I'm encountering is that how I should extract the Triaxial stress component.

 

[TGS4]

I'd like to know if it means that I should evaluate stress at locations away from discontinuities or not.

You would evaluate P_m where it ought to be evaluated (hint - it isn't at a discontinuity).

Regarding your question about the triaxial stress, I don't understand your problem. Perhaps if you had some additional information, including the software that you are using and the geometry, it would help us help you.

 

[Sajjad2164]

Why are the Pm and Pb stress components just evaluated?
Actually, I am using Abaqus CAE. The model is built with solid elements.

 

[TGS4]

It is not your place to ask "why" of the Code. It is your place to ask "how". The answer to the "why" is "because the Committee determined it to be so".

You should be able to extract S1 and S2 and S3 - you could even make a field variable in the Viewer that is the algebraic sum of the three.

 

[Sajjad2164]

Thanks, TGS4.
Can you tell me how code has decided to use only Pm and Pb?
Thanks

 

[TGS4]

Because that committee determined it to be so.