Dear Sir,
Do we have any command to change thickness reference in built-in S-N curve in SACS?
For example,
Thickness reference for tubular connection should be 32mm for DNVGL-RP-0005 (2014) S-N "T" Curve.
However, SACS used tref = 25mm for this curve which will provide too conservative fatigue output.
Currently, I have to manually key-in S-N curve by myself. This have a problem as I have to create two S-N for both underwater and air which make me 2 fatigue runs.
If you have any command to override this thickness reference of SACS built-in S-N, please kindly help to let me know.
If we cannot override this tref, please kindly put this issue into your future development.
Regards,
Kasiphon
Kasiphon,
When selecting the NT option for the Norsok 'T' SN curve, SACS actually uses the 3.2 cm minimum thickness instead of the 2.5 cm minimum output (See below).
There is currently no way to override the minimum thickness used for thickness correction. I will make a note to the developers to work on adding minimum thickness overrides for default SN curves.
Geoff
Hi Geoff,
Sorry, I give you wrong example.
For example, DNV or NORSOK 'E' or 'W3', it should be 32mm. If weld from one-side, k should be 0.1.
However, SACS always used 25mm and k=0.2 , see picture below.
This provide too conservative result.
Btw, please make a note in your development. I request to have option to override, tref and k in the SN curve in the new version of SACS
Regard,