Well, depends on what you mean by, "contact"; are we talking stiffness dependent behavior or just the ability to tie interfaces together? If it's the former, then yes (you can adjust the global definition under "Model Setup" by setting the default interface to "contact" and adjusting the separation distance). If it's the latter, then you'll need to ensure the surface/edges are coincident (or manually tie them with rigid links or weighted-links+springs).
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