Diferent allowable stresses for the same pipe

Here you can post your question about ROHR2.
Antworten
claudio_mend
Beiträge: 23
Registriert: Di 17. Sep 2013, 22:20

Diferent allowable stresses for the same pipe

Beitrag von claudio_mend » Do 21. Jun 2018, 17:08

Good Afternoon,

I was checking my results and saw that the allowable stresses for the expansion load case is varying along the pipe. Some were considered as 86.4 while others 206.4MPa. I also found that the values considered as Allowables for the material SA672 B60 at temperature 70ºC was rather low 86.4MPa. Do you have any idea why this is hapenning?

Thank you for the help.
Sie haben keine ausreichende Berechtigung, um die Dateianhänge dieses Beitrags anzusehen.

Benutzeravatar
rohr2support
Beiträge: 393
Registriert: Mi 14. Sep 2011, 08:23

Re: Diferent allowable stresses for the same pipe

Beitrag von rohr2support » Do 28. Jun 2018, 08:21

Hi

Could you be a bit more specific about what kind of stress-analysis you are performing?

Reasons for different allowable stresses could be:
  • different materials
  • different design temperatures
  • different wall thickness
  • different results for SL equation for stress analysis with liberal stress SE
...

You should be able to see the parameters used in the node window:
SE_stresses.PNG
Best regards

ROHR2 Support
Sie haben keine ausreichende Berechtigung, um die Dateianhänge dieses Beitrags anzusehen.

claudio_mend
Beiträge: 23
Registriert: Di 17. Sep 2013, 22:20

Re: Diferent allowable stresses for the same pipe

Beitrag von claudio_mend » Fr 29. Jun 2018, 20:22

I found out what the problem was. I was setting the reduction of allowable stresses at low temperatures! After I removed this selection the allowable went back to what I expected.
Thank you again for the help.
Sie haben keine ausreichende Berechtigung, um die Dateianhänge dieses Beitrags anzusehen.

Antworten

Wer ist online?

Mitglieder in diesem Forum: Bing [Bot] und 1 Gast