Tightening Join | ||||
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| Attributes | |
|---|---|
| Type | join element |
| Physical property | Tightening Property |
| Mesh connectivity | SPIDER |
| Number of nodes | 1 slave, n-1 masters |
| Degrees of freedom (per node) | 3 (3 translations) |
| Type of behavior | kinematics |
Mesh visualization: 
The relations are obtains in the following way:
- Compute the projection of the slave node (N1) on the surface defined by n-1 master nodes.
- Interpolate the displacement of the projected point (P) using the shape function of the face defined by the master nodes.
- Link the displacement of the slave node (N1) to the displacement of the projected point (P) using rigid-body equations, except for the translation in the direction of the tightening given by the property.
- Impose a minimum overlap in the direction given by the property between the slave node (N1) and the projected point (P).
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.
Tightening elements generate a two-steps computation:
- Submit a tightening force.
- Impose a minimum overlap equal to the overlap obtained in the first step.