First, create solid model entities that represent the geometry of the contacting bodies. Set element types, real constants, and material properties as you would for any analysis. Mesh the contacting bodies by meshing the areas or volumes with the element type that you have chosen (AMESH and VMESH commands). For more information, see the Modeling and Meshing Guide.
Note: You should avoid midside-noded elements for 3D contact surfaces when using node-to-surface element CONTA175.