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Hi Jose, I do Herz contact with some frequency. Here is what I do, First of all, contacts must be set for start, what means to adjust bearing and shaft to be tangent, having the load normal to the contact. The contact between them must be surface to surface, with a good degree of refinement. The Stress results are structural stresses, from the boundary to inside the model, so you can see the compression distribution locally, even the beautiful maximum stress just at converging point somewhere beneath the surface, plus the stretch at plus/minus 90deg from the contact, where the bearing is being pushed (in my cases).
The hertz contact is a surface or contact characteristic and you can see it plotting contact pressure instead of tensions (defined as one kind of stress plot, just change the type).
now, about the same study returning different results, did you sent it to your reseller to forwward as Service request? I mean, that dismiss completely confidence on the program...
Attached are 1 an image of a contact problem and 2 the associated files withthe problem set up in SWX 2009 format. My hand calcs for hetz contact problems - this case is pretty easy to run a hand calc on - pretty much nails the 67ksi peak shown inthe curve plot. The maximum would typically have some noise associated with it. Not sure why this is but probably due the specifics of the contact formulation, mesh, etc. I put a small .001" gap prior to startinghte analysis and I also use an elastic support to provide initial stiffnes. Hope this helps.