ansys.dyna.core.pre.dynabase.Constraint
=======================================

.. py:class:: ansys.dyna.core.pre.dynabase.Constraint

   
   Provides a way of constraining degrees of freedom to move together in some way.
















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   .. py:attribute:: spotweldlist
      :value: []



   .. py:attribute:: cnrbsetidlist
      :value: []



   .. py:attribute:: jointsphericallist
      :value: []



   .. py:attribute:: mergerigidlist
      :value: []



   .. py:method:: create_spotweld(nodeid1, nodeid2)

      
      Define massless spot welds between non-contiguous nodal pairs.


      :Parameters:

          **nodeid1** : :class:`python:int`
              ID for the first node.

          **nodeid2** : :class:`python:int`
              ID for the second node.



      :Returns:

          :ref:`bool <python:bltin-boolean-values>`
              ``True`` when successful, ``False`` when failed.











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   .. py:method:: create_cnrb(nodeset)

      
      Create a nodal rigid body, which is a rigid body that consists of defined nodes.


      :Parameters:

          **nodeset** : :obj:`NodeSet`
              Node set that defines the rigid body.



      :Returns:

          :ref:`bool <python:bltin-boolean-values>`
              ``True`` when successful, ``False`` when failed.











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   .. py:method:: create_joint_spherical(nodes, relative_penalty_stiffness=1.0, damping_scale_factor=1.0)

      
      Create a joint between two rigid bodies.


      :Parameters:

          **nodes** : :class:`python:list`
              List of nodes for creating the joint.

          **relative_penalty_stiffness** : :class:`python:int`, :obj:`optional`
              Relative penalty stiffness. The default is ``1.0``.

          **damping_scale_factor** : :class:`python:int`, :obj:`optional`
              Damping scale factor on the default damping value.
              The default is ``1.0``.














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   .. py:method:: merge_two_rigid_bodies(lead_rigidbody=0, constrained_rigidbody=0)

      
      Merge two rigid bodies.

      One rigid body, called the constrained rigid body,
      is merged into another rigid body, called the lead rigid body.

      :Parameters:

          **lead_rigidbody** : :class:`python:int`, :obj:`optional`
              Part ID for the lead rigid body. The default is ``0``.

          **constrained_rigidbody** : :class:`python:int`
              Part ID for the constrained rigid body. The default is ``0``.














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   .. py:method:: create()

      
      Create a constraint.
















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