Limit Load Analysis - internal pressure

[Chrissy123]

Hi - I am modelling a cylindrical pressure vessel. I have carried out a mesh convergence study for smaller pressure loads so I'm happy with that. The material is elastic perfectly plastic. what I need to do now is apply internal pressure and find out what pressure would cause the vessel to 'brust'. There seem to be a lot of definitions around what 'burst' actually means but I'm assuming that it's when the UTS is reached or at the point when a proportion of the points within the part that has the most stress have achieved AC YIELD and hence are plastic ? Anybody done anything similar that could advise on the best way to do this and also how to extract the value of the pressure that would cause the vessel to burst ? thanks,

 

[FEA way]

Burst of pressure vessel is defined as explosive failure (rupture). Detailed description of burst testing (both experimental and with FEA) can be found in ASME Boiler and Pressure Vessel Code (mainly section VIII). For FEA evaluation you should check Section 1 Division 2.

 

[TGS4]

Follow the rules in ASME Section VIII, Division 2, Part 5. It describes everything that you need to know/do.