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Principal stress direction

Hi!

I am working with creo elements 5.0 M190

I have to distract the maximum principal stresses at the weld toe. Due to singularity, I do the extrapolation techniques(collecting the stress away from the desired location and extrapolating back to it).

I put a measure point and study the model and obtain the maximum principal stress so I have magnitude now and need only the directions. I tried with vectors but still I could not find. Can someone help with this? Thanks in advance.
 

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