Entering in RFEM
A surface release can be defined using the menu 'Insert' → 'Model Data' → 'Surface Releases' or using the project navigator data 'Model Data' → 'Surface Releases'. First, select the original surface, which is a basis for the surface release, graphically in the work window by using the 'New Surface Release' dialog box. Then, define a suitable surface release type, that is, in which local directions the objects are released or nonlinearities such as failure for only one direction. Similarly, you can also define inclined releases by means of spring constants. Finally, define the released objects.
surface release, contact, nonlinearity