A couple of questions. I would have assumed the P1 principle stress and the big tensile stress in the vonmises tensor plot to have the same magintude and direction. Seems they do not. Also, I would expect P2 to be perpendicular to P1. Seems it is not with a vector plot. I am going to mesh it a little fineer with more mesh control at the split line where the gauge is and see if that makes more sense,
I am trying to compare strain gauge results with a rosette strain gauge to FEA results in a failry low gradinent area. What is the best way to show the two principle stains/stress as found on the surface? I believe there should only be two on the surface.