Created By : Abhinandan Kumar

Reviewed By : Rajashekhar Valipishetty

Last Updated : May 17, 2023

Using the angle of rotation and the applied moment, the rotational stiffness calculator calculates the stiffness of a body. The ability of an object to deform under loading conditions is determined by its rotational stiffness. Various research utilizing turbines, vibrations, and springs demonstrate the concept's usefulness. Continue reading to learn how to calculate rotational stiffness and the rotational stiffness formula.

Applied moment
Angle of Rotation
Choose the unit you want to calculate in:


What is meant by Rotational Stiffness?

Let's look at stiffness first before moving on to rotational stiffness. The resistance to deformation under load is defined as the quality of a body's stiffness. The stiffness of a body k is defined as the ratio of the force applied F to the displacement caused by the force, as follows: k = F / ≡¥¢┐

Similarly, rotational stiffness is defined as a body's ability to resist rotation or the ratio of applied moment M to rotational angle. The rotational stiffness equation is expressed mathematically as follows: k = M / ╧┤

How do you calculate Rotational Stiffness?

To compute the rotational stiffness of a body using this calculator, follow the steps below:

  • Step 1: Enter the applied moment's value.
  • Step 2: Input the radian value of the rotation angle.
  • Step 3: The rotational stiffness value will now be returned by the calculator.

What are the Applications of Rotational Stiffness?

  • In foundations and construction work, rotational stiffness is utilized. To calculate the stiffness of a circular foundation subjected to rocking motion, the rotational stiffness formula is utilized.
  • The rigidity of individual structural parts, such as beams, columns, and arches, is calculated using rotational stiffness in building construction.
  • Crossflow winds can cause vibrations in mechanical components like aircraft wings, as well as architectural and construction components like chimneys.
  • Offshore wind turbine platforms are designed and built with rotational stiffness in mind in order to achieve optimal stability as they float on the ocean amid varying water wave strengths.

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FAQs on Rotational Stiffness Calculator

1. What is the formula for calculating rotational stiffness? 

To determine rotational stiffness, use the following formula: Divide the applied moment from the rotational angle.

2. What is a joint's rotational stiffness?

The ratio of the applied moment to the angular rotation is the definition of rotational stiffness (which is the rotational equivalent of the spring constant in vertical loading).

3. What is the rotational stiffness unit?

Rotational stiffness is commonly measured in newton-meters per radian in the SI system. Rotational stiffness is commonly measured in inch-pounds per degree in the SAE standard.

4. What is the definition of axial stiffness?

The ratio of axial load to axial deflection is known as axial stiffness, abbreviated as k. When a force is exerted parallel to the axis of another item, it is called an axial load.

5. What is the definition of axial displacement?

Axial displacement refers to a movement along an axis in only one dimension. This indicates that the object does not spin in any way. It can only translate in one direction, such as the right to left and vice versa, top to bottom and vice versa, or back and forth.