Rotate results to CS for each time point

Does someone have an example of taking an APDL element CS and getting stress results in relation to that system for each time point with DPF?

I want to use the geo.rotate operator and an operator to get the element CS with its corresponding Euler angles from the .rst file for each time point.

I see this operator, but not sure if it gets what I want: result.euler_nodes

Also, I would need to the function/equation to convert the euler angles to rotation matrix for the geo.rotate operator.

Lastly, is there a way to do this as a single operator? I see the operator for the fields container for geo.rotate, but that seeems to take a single rotation matrix, and this question is for a rotation matrix that is also results-set-specific.

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Ricardo Peixoto Coelho

Hello @Mike.Thompson,

Do I understand it correctly that you want to get the results in the element coordinate system (equivalent to /RSYS,SOLU in MAPDL)

If that's the case, you can obtain them by setting the pin bool_rotate_to_global to false.

Mike.Thompson

@Ricardo Peixoto Coelho , Thanks for the response. That is a reasonable question, however, no, this is not what I am trying to do. In my case I want to get the values for a set of element results in relation to a particular CS that is defined with an initial frame and euler angles that change with time.

So it is not the individual element CS, thus rotate to global = False will not do what I want to do, nor the /RSYS in APDL. Imagine there is a particular element (say a joint) that defines an orientation. I want to use that instantaneous orientation to then get other results in that same frame.