EJ_
Mechanical
- Mar 30, 2023
- 6
Hi all Code-Gurus,
ASME BPVC Section III Div 5 - Nonmandatory Appendix HBB-T refers to "detailed inelastic analysis" a few times (and "simplified inelastic analysis"). (e.g. HBB-T-1331(c))
Does anyone know if & where there's any formal guidance on what's considered detailed inelastic analysis?
HBB-T-1121 seems to just imply that anything where you simplify anything to come up with conservative bounds is simplified, and conversely then implies detailed analysis would just be considering whatever sound engineering practice would consider, i.e. all relevant loads/BCs/etc.
Currently I'm just using my gut feel that by fully modelling some hot piping in FEA and applying actual time/load history with an MPC Omega creep model (from API579-1), and elastic-perfectly-plastic at hot yield (again per API579-1 guidance) this probably satisfies what they're intending.
I should clarify that I'm most certainly not designing anything nuclear! I'm just applying these creep methods to some hot piping, partly due to client request, and partly because it seems more comprehensive and clear to follow than API579-1 §10.5.2.
Thanks,
Edd
ASME BPVC Section III Div 5 - Nonmandatory Appendix HBB-T refers to "detailed inelastic analysis" a few times (and "simplified inelastic analysis"). (e.g. HBB-T-1331(c))
Does anyone know if & where there's any formal guidance on what's considered detailed inelastic analysis?
HBB-T-1121 seems to just imply that anything where you simplify anything to come up with conservative bounds is simplified, and conversely then implies detailed analysis would just be considering whatever sound engineering practice would consider, i.e. all relevant loads/BCs/etc.
Currently I'm just using my gut feel that by fully modelling some hot piping in FEA and applying actual time/load history with an MPC Omega creep model (from API579-1), and elastic-perfectly-plastic at hot yield (again per API579-1 guidance) this probably satisfies what they're intending.
I should clarify that I'm most certainly not designing anything nuclear! I'm just applying these creep methods to some hot piping, partly due to client request, and partly because it seems more comprehensive and clear to follow than API579-1 §10.5.2.
Thanks,
Edd