Thank you for your response!
Actually, for us having a singularity there is not a problem because we are not interested in reading Von Mises stresses in that area. We solved the problem by applying surface traction on a small surface.
I have another question to ask you: simulating a contact case between two mechanical components we get a spot distribution (see Fig.1 below) of von mises stresses right in the contact zone with any option of “surface interaction” (tied, hard etc…) and any option of “contact pair” (surface to surface and node to surface). Would you have advice on how to get a more continuous solution as in Ansys (Fig.2)?
Fig1
Fig2
Is there in prepomax an analogue of the “nodal projection” function found in Ansys Mechanical?