4. What uses can be made of this modeling?

In addition to the two uses referred to in [§2] [Figure 2.1-a] and [Figure 2.1-b], this connector can also be used to:

• apply a force twister to a surface known from a 3D modeling:

To do this, the user defines the surface for applying the force (\(\mathit{lma}\)), he « connects » it with a node (\(P\)) of a discrete element (DIS_TR_N) without rigidity then he applies the desired torsor to this node (FORCE_NODALE).

In this way, the twister is applied « gently », without creating parasitic stresses on the surface.

• « retain » a structure without over-embedding it:

For example, if you have meshed a pipe in 3D and you want to prevent its solid body movements

we connect \((S)\) to \(P\) then we block the 6 degrees of freedom of \(P\).

The structure is then retained, without \((S)\) being embedded. In particular, section \((S)\) may be oval.