Theory Manual Version 3.4
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Subsection 7.4.4: Discretization Up Chapter 7: Contact and Coupling Subsection 7.5.1: Gap Function

## 7.5 Tied Contact

In some situations it is useful to connect two non-conforming meshes together. This can be done by defining a tied contact interface. In FEBio, the tied contact works very similar to the sliding contact interface. We need to define a slave surface and a master surface, where it is assumed that the slave surface nodes will be tied to the master surface faces.
Subsection 7.4.4: Discretization Up Chapter 7: Contact and Coupling Subsection 7.5.1: Gap Function