Contact pressure at master and slave nodes

[vikiwi]

Hi,

I have a surface-to-surface contact tie between two bodies. Body 1 has a "coarse" mesh (and will define the master surface) and body 2 has a fine one (slave surface). All master nodes have the same coordinates as some slave nodes.
My problem is that when I look at the contact pressure (CPRESS), this one is different for master/slave node pairs while those nodes are coincident. Is it a problem in the mesh or is there any mathematical explanation?
Moreover, I could I see the direction of the pressure?

I hope that you could help me.
Thank you for response.
Sincerely

 

[xerf]

I do not understand how you have a coarse mesh and fine mesh but you have nodes in contact with the same coordintates.

The cpress is normal to the surfaces. If you activate the surface normals in the Viewer, those are the directions.

If remember well, cpress can be plotted only using the "banded" contours, therefore some numerical differences caused by the extrapolation to nodes might be possible.