27.3.4. Normal and Tangential Force Imposed

The normal and tangential force imposed condition allows you to specify the normal force (f) and tangential force (f) components on the boundary section. This condition is used for free boundaries. Both forces are expressed in units of Pascal.

The default condition corresponds to f = f = 0, but you can assign nonzero values for one or both of the components. The normal and tangential directions are defined in Normal and Tangential Displacement Imposed.

For the tangential displacement in 3D, it is not possible to assign a nonzero value for f due to orientation conventions.

To define the normal and tangential force on a boundary section you will need to do the following:

  1. Select Normal and tangential force imposed (fn, fs) from the list of boundary conditions.

      Normal and tangential force imposed (fn, fs)

  2. Specify f as Constant or Linear function of coordinates.

  3. Select the Upper level menu. Ansys Polydata will open the menu where you can specify f in a similar manner (2D only).