Required parameters
- REF NODE
-
Set this parameter equal to either the node number of the rigid body
reference node or the name of a node set containing the rigid body reference
node. If the name of a node set is chosen, the node set must contain exactly
one node.
At least one of the following parameters is required
- ANALYTICAL SURFACE
-
Set this parameter equal to the name of the analytical surface to be
assigned to the rigid body.
- ELSET
-
Set this parameter equal to the name of the element set containing the
elements to be assigned to the rigid body. An element cannot appear in more
than one rigid body.
- PIN NSET
-
Set this parameter equal to the name of a node set containing pin-type nodes
to be assigned to the rigid body. This parameter can be used to add nodes to a
rigid body or to redefine node types of nodes on elements included in the rigid
body by the ELSET parameter. Pin-type nodes have only their translational degrees
of freedom associated with the rigid body. A node cannot appear in more than
one rigid body definition.
- TIE NSET
-
Set this parameter equal to the name of a node set containing tie-type nodes
to be assigned to the rigid body. This parameter can be used to add nodes to a
rigid body or to redefine node types of nodes on elements included in the rigid
body by the ELSET parameter. Tie-type nodes have both their translational and
rotational degrees of freedom associated with the rigid body. A node cannot
appear in more than one rigid body definition.
Optional parameters
- ALPHA
-
This parameter applies only to
Abaqus/Standard
analyses.
Set this parameter equal to the thermal expansion coefficient.
- ISOTHERMAL
-
This parameter is used only for fully coupled thermal-stress analysis.
Set this parameter equal to YES to specify an isothermal rigid body. The default is ISOTHERMAL=NO.
- POSITION
-
Set POSITION=INPUT (default) if the location of the reference node is to be
defined by the user.
Set POSITION=CENTER OF MASS if the reference node is to be located at the center of mass
of the rigid body.
Optional parameters (use only when the element set specified contains
rigid elements)
- DENSITY
-
This parameter applies only to
Abaqus/Explicit
analyses.
Set this parameter equal to the density of all of the rigid elements in the
element set.
- NODAL THICKNESS
-
This parameter applies only to
Abaqus/Explicit
analyses.
Include this parameter to indicate that the thickness of the rigid elements
should not be read from the data line but should be interpolated from the
thickness specified at the nodes with the
NODAL THICKNESS option.
- OFFSET
-
This parameter applies only to
Abaqus/Explicit
analyses.
Include this parameter to define the distance (as a fraction of the rigid
element's thickness) from the element's midsurface to the reference surface
containing the element's nodes. Since no element level calculations are
performed for rigid elements, a specified offset affects only the handling of
contact pairs with rigid surfaces formed by rigid elements.
This parameter accepts positive or negative values or the labels
SPOS or SNEG.
The positive values of the offset are in the direction of the element normal.
When OFFSET=0.5 (or SPOS), the top surface
of the rigid element is the reference surface. When OFFSET=−0.5 (or SNEG), the bottom
surface of the rigid element is the reference surface. The default is OFFSET=0, which indicates that the middle surface of the rigid element
is the reference surface.
There are no data lines associated with this option in an
Abaqus/Standard
analysis
Data line for R2D2,
RB2D2, and
RB3D2 elements in an Abaqus/Explicit analysis
- First (and only)
line
-
Cross-sectional area of the element. The default is 0.
Data line for RAX2, R3D3, and R3D4 elements in an
Abaqus/Explicit
analysis
- First (and only)
line
-
Thickness of the element. The default is 0.