The stiffness of a body is a measure of the resistance offered by an elastic body to deformation. A body have a rotational stiffness when it is in a rotational movement and is depended on the applied moment and the angle of the rotation.
The stiffness of a body is a measure of the resistance offered by an elastic body to deformation. For an elastic body with a single degree of freedom (for example, stretching or compression of a rod), the stiffness is depended on the force applied on the body and the displacement produced by the force.
(The degree of freedom (DOF) of a mechanical system is the number of independent parameters that define its configuration.)
A body may have a rotational stiffness depended on the angle of the rotation and the applied moment.
|k||Rotational stiffness (N*m/radians)|
|M||Applied moment (N*m)|
|θ||The angle of the rotation (radians)|