CXX Contact

kuhlkuhl
Hi all,
I am having issues with CXX contacts (symmetric model of rod in a hole).
Contacts 3 and 3b (bonded, elastic) cause stress without any load on the model.


It gets worse with increasing contact stiffness (1st image: 2000 GPa/m, second image: 200000 GPa/m


What am I missing?

Comments

  • disladisla
    All geometries have initial penetration.
    Some contact definitions are solved as an interference fit. take a look at the adjust parameter.
  • FatmacFatmac
    This issue has confused me a lot in the past - now my work flow for any contact analysis includes an initial run with no loads applied to see if there are any odd interferences. In this case I see the interference here. The odd part of it is that when I use view cracks I see this I have seen this before where the "open cracks" view suggest there is no interference but the mesh actually has some overlaps. I have also seen scenarios where the .step files have no interference but after meshing they do
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