FBD elemental system

AM_20700
AM_20700 Altair Community Member
edited March 5 in Community Q&A

I'm trying to calculate hot spot stress via FBD. I'm need to sum the direct nodal stress and the secondary stress (resulting from moments) in a specific direction.
But my nodes follow a curved path, so the relevant moment axis changes.
For example, I want to sum the nodal forces (in red) and the nodal moments that create forces along the same direction. For a portion of the path, it's the Y-moment (in green) and then it transitions to the Z-moment (blue).

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When I export the FBD nodal forces and moments via a table, I can't extract the relevant moment.
Is there a way to have the FBD system track the elemental system at each node?
Is there a way to set a user system that is normal to the element edge at every element?

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Answers

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited March 5

    Hello,

    The FBD system is not relevant to the elements but to their nodes (as we are talking here about Grid Point Forces), thus, the analysis system is the nodal analysis one (or displacement system).

     

    With this in mind, I’d suggest setting the model assigning to the nodes on the curvature either local systems or at least a cylindrical one.

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