Fastened Join

Join element allows connecting a node and a face of an element.

Type

join element

Physical property

smooth body motion

Mesh connectivity

SPIDER

Number of nodes

1 slave, n-1 masters

Degrees of freedom
(per node)

depend of the dimension

Type of behavior

kinematics

Mesh visualization:

The relations are obtains in the following way:

  1. Compute the projection of the slave node (N1) on the surface defined by n-1 master nodes.
  2. Interpolate the displacement of the projected point (P) using the shape function of the face defined by the master nodes.
  3. Link the displacement of the slave node to the displacement of the projected point (P) using rigid-body equations.

The projected point (P) is a conceptual point, that means it is never created. The displacement of this point is always expressed in terms of displacement of the master nodes through interpolation.