acces to the stress components of a node

[76185]

Hi everybody,

Postprocessing my ODBfile ,I am trying to get access to the mises stress at some nodes of my model and I want to do that with a python subroutine (not in the visualization module !).
Getting the nodal coordinates is not a problem, getting the stress of the elements is not a problem...But how can I get the stress at the nodes ???

Thank you

Doug

 

[vumat721]

I hope you've solved your problem by now. In any case, this command will work:

myOdb = session.openOdb(name='c:/path/to/your/odb/file.odb')
myMises = session.xyDataListFromField(odb=myOdb, outputPosition=NODAL, variable=(('S', INTEGRATION_POINT, ((INVARIANT, 'Mises'), )), ), nodeLabels=(('PART-1-1', ('1', )), ))

This will return the mises stress at node 1 of part-1-1 as a function of time in the variable myMises. The key is that mises is stored at the integration point, and you have to request the output position to be "nodal". There are many ways to specify your nodes, you don't have to use the nodeLabels keyword to do it. See the function description in Section "51.1.5 xyDataListFromField(...)" of the Abaqus 6.8 Scripting Reference Manual for more guidance.

 

[76185]

Yes I had solved the problem but it's good for the forum's users.