Nonlinear Imperfect Interface

Description

This imperfect interface contact law implements an imperfect interface with tractions that depend on displacement discontinuities at the interface. It is currently the same as the Linear Imperfect Interface except the implementation is done differently. It is more approximate, but likely very close to linear law and possibly faster. In the future, this law (or subclasses of this law) will add actual non-linear traction laws.

Properties

The properties for this law are:

Property	Description	Units	Default
Dnt (or Dn), Dnc, and Dt	See Linear Imperfect interface properties	pressure/length units	-1
order	Specify order of approximation to interface laws as zeroth (0) or first (1) order	none	1

Examples

 Material "interfaceID","My Imperfect Interface","NoninearInterface"
   Dn 500
   Dt -1
   order 1
 Done