RelConnectsRigidLink

Rigid Link

A virtual connection of two nodes from(StructuralPointConnection) for directly defined nodes, (StructuralSurfaceMember) or (StructuralCurveMember)for internal nodes on 1D and 2D members, where structural behavior could be set. Master and slave node have to be defined. The rigid links are used for the connection, where you want to simulate infinite rigidity or user defined properties.

Specification in the excel

Name of the column header	Type of data	Value example or enum definition	Required value	Description
Name	String	RL1	yes	Human readable unique name of the object
Nodes	String	N3; N4	yes	The name of the valid existing node (StructuralPoinConnection), or (StructuralCurveMember, StructuralSurfaceMember) for internal nodes Maximum of two nodes can be connected by RelConnectsRigitLink First in node is seen as "master node", second in row is "slave node"
Hinge position	Enum	None Begin (master node) End (slave node) Both	yes	This attribute serves to indicate if hinges should be applied to rigid link and if so, than on which node. Hinge position allows user to define constrains of selected node or nodes of RelConnectsRigidLink for translation (ui) and rotation (fii)
ux	Enum	Free Rigid Flexible Compression only Tension only Flexible compression only Flexible tension only Non linear	yes	Displacement in the direction X Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined (Flexible) compression/tension only - acts rigid or flexible, only for defined strain (compression or tension) See notes for coordinates reference.
uy	Enum	Free Rigid Flexible Compression only Tension only Flexible compression only Flexible tension only Non linear	yes	Displacement in the direction Y Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined (Flexible) compression/tension only - acts rigid or flexible, only for defined strain (compression or tension) See notes for coordinates reference.
uz	Enum	Free Rigid Flexible Compression only Tension only Flexible compression only Flexible tension only Non linear	yes	Displacement in the direction Z Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined (Flexible) compression/tension only - acts rigid or flexible, only for defined strain (compression or tension) See notes for coordinates reference.
fix	Enum	Free Rigid Flexible Non linear	yes	Rotation around X axis Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined See notes for coordinates reference.
fiy	Enum	Free Rigid Flexible Non linear	yes	Rotation around Y axis Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined See notes for coordinates reference.
fiz	Enum	Free Rigid Flexible Non linear	yes	Rotation around Z axis Free - That is it imposes no constraint in the direction. Rigid - The connection in fully rigid in the specified direction. Flexible - The connection is flexible (elastic) in the specified direction. Non linear - resistance in specified direction could be defined See notes for coordinates reference.
Stiffness X [MN/m]	Double	3.00	yes, if ux = Flexible, Flexible compression/tension only or Non linear	The flexibility in direction X Use this property only if the ux is set Flexible, Flexible compression/tension only or Non linear See notes for coordinates reference.
Resistance X [MN]	Double	0.25	yes, if ux = Non linear	The resistance in direction X Use this property only if the ux is set to Non linear See notes for coordinates reference.
Stiffness Y [MN/m]	Double	2.50	yes, if uy = Flexible, Flexible compression/tension only or Non linear	The flexibility in direction Y Use this property only if the uy is set Flexible, Flexible compression/tension only or Non linear See notes for coordinates reference.
Resistance Y [MN]	Double	0.30	yes, if uy = Non linear	The resistance in direction Y Use this property only if the uy is set Non linear See notes for coordinates reference.
Stiffness Z [MN/m]	Double	2.00	yes, if uz = Flexible, Flexible compression/tension only or Non linear	The flexibility in direction Z Use this property only if the uz is set Flexible, Flexible compression/tension only or Non linear See notes for coordinates reference.
Resistance Z [MN]	Double	0.75	yes, if uz = Non linear	The resistance in direction Z Use this property only if the uz is set Non linear See notes for coordinates reference.
Stiffness Fix [MNm/rad]	Double	5.00	yes, if fix = Flexible or Non linear	The flexibility in rotation around X axis Use this property only if the Rotational stiffness fix is Flexible or Non linear See notes for coordinates reference.
Resistance Fix [MNm]	Double	1.00	yes, if fix = Non linear	The resistance in rotation around Y axis Use this property only if the Rotational stiffness fix is Non linear See notes for coordinates reference.
Stiffness Fiy [MNm/rad]	Double	6.25	yes, if fiy = Flexible or Non linear	The flexibility in rotation around Y axis Use this property only if the Rotational stiffness fiy is Flexible or Non linear See notes for coordinates reference.
Resistance Fiy [MNm]	Double	0.80	yes, if fiy = Non linear	The resistance in rotation around Y axis Use this property only if the Rotational stiffness fiy is Non linear See notes for coordinates reference.
Stiffness Fiz [MNm/rad]	Double	3.00	yes, if fiz = Flexible or Non linear	The flexibility in rotation around Z axis Use this property only if the Rotational stiffness fiz is Flexible or Non linear See notes for coordinates reference.
Resistance Fiz [MNm]	Double	0.10	yes, if fiz = Non linear	The resistance in rotation around Z axis Use this property only if the Rotational stiffness fiz is Non linear See notes for coordinates reference.
Id	String	39f238a5-01d0-45cf-a2eb-958170fd4f39	no	Unique attribute designation

Notes

For constrains, the LCS of RelConnectsRigidLink is taken into account.

Local coordination system is given by master node and its parent object.

Non linear behavior of material is handled with "Resistance". The example is shown below.