*CONSTRAINED_JOINT_LOCKING

This keyword is created for a body to body fixed joint in the mechanical GUI. 

*CONSTRAINED_JOINT_REVOLUTE

This keyword is created for a body to body revolute joint in the mechanical GUI.

*CONSTRAINED_JOINT_TRANSLATIONAL

This keyword is created for a body to body translational joint in the mechanical GUI.

*CONSTRAINED_JOINT_CYLINDRICAL

This keyword is created for a body to body cylindrical joint in the mechanical GUI.

*CONSTRAINED_JOINT_UNIVERSAL

This keyword is created for a body to body universal joint in the mechanical GUI.

*CONSTRAINED_JOINT_SPHERICAL

This keyword is created for a body to body spherical joint in the mechanical GUI.

*CONSTRAINED_JOINT_PLANAR

This keyword is created for a body to body planar joint in the mechanical GUI.

*CONTROL_RIGID

Specify the explicit rigid body joint treatment. It can use an implicit formulation which uses Lagrange multipliers or penalty.