When I use surface to surface contact everything works ok. When trying to generate contact connections specifying plate elements for regions it doesn't seem to work. No error messages, no contact, elements penetrate each other as if no contact were present.
Any suggestions. The current state of the model doesn't have useful surfaces for this.
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This could be something related to Shell normals of plate elements:
If problem persist post your FEMAP model and we can take a look to it.
Thanks, I'm familiar with element orientation. Might be the "islands". Separate areas in surface regions are ok. There are two separate "islands" of adjacent elements in this region.