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Subsection 3.13.8: Tied Multiphasic Interfaces Up Section 3.13: Contact Section Section 3.14: Constraints Section

### 3.13.9 Sticky Interfaces

A sticky interface is similar to a tied interface except that it allows for initial separation of the tied surfaces and breaking of the tie after a user-defined normal traction is exceeded. The tie is only applied when the surfaces contact and sustained as long as the normal traction is less than the threshold.
 Parameter Description laugon augmentation flag penalty penalty factor tolerance augmentation tolerance minaug minimum number of required augmentations maxaug maximum number of augmentations search_tolerance tolerance for nodal projection onto secondary surface facet max_traction threshold for normal traction (1) snap_tol minimum distance for tie activation (2)
The contact surfaces are defined as in the tied interface (see Section 3.13.5↑).