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#76429 - 05/11/22 02:09 AM Fatigue analysis. Code stress instead equivalent stress.
MynamePavel Offline
Member

Registered: 02/12/22
Posts: 7
Loc: Moscow Russia
Good time for every body.

I have to do assessment by EN13480 that references to En13445. I selected ABS as combination method for all FAT load cases. If I look to FAT load case result as allowable circles number and check by S-N chart coresponded stress it is code stress but not 3D Max stress.

How to switch type stress for FAT analysis (from code stress to equvivalent)?

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#76430 - 05/11/22 02:11 AM Re: Fatigue analysis. Code stress instead equivalent stress. [Re: MynamePavel]
MynamePavel Offline
Member

Registered: 02/12/22
Posts: 7
Loc: Moscow Russia
List of load cases:
Picture 1

Fat result:
picture 2
See load case 106
Node 1258
Allowable circles number is 1527

stress result:
picture 3
for same node.
According S-N chart 1527 circles correspond to 439830KPa
But in stress report it is next to code stress 453509KPa


CII options:
Picture 4


Edited by MynamePavel (05/11/22 02:25 AM)

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#76431 - 05/11/22 08:26 PM Re: Fatigue analysis. Code stress instead equivalent stress. [Re: MynamePavel]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6164
Loc: Houston, Texas, USA
Sorry, we can't access your pictures - the Browser responds with "the site can't be reached".

However, the code stress for the FAT load cases is the 3D Max/Equivalent stress, regardless of the piping code used in the analysis. There is no need to switch anything.

If this doesn't help, please file a Support Request on Smart Support.
_________________________
Regards,
Richard Ay - Consultant

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