Rotational Stiffness
A body may also have a rotational stiffness, k, given by
where
- M is the applied moment
- θ is the rotation
In the SI system, rotational stiffness is typically measured in newton-metres per radian.
In the SAE system, rotational stiffness is typically measured in inch-pounds per degree.
Further measures of stiffness are derived on a similar basis, including:
- shear stiffness - ratio of applied shear force to shear deformation
- torsional stiffness - ratio of applied torsion moment to angle of twist
Read more about this topic: Stiffness
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