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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › When do I need to change the torsional stiffness value for a revolute joint? › Reply To: When do I need to change the torsional stiffness value for a revolute joint?

March 17, 2024 at 2:11 pm
Jana Rittelmann
Subscriber

 

Thank you for your explanation. I do think I need to take into account the torsional stiffness in my case.

One more question: I am trying to calculate it for my component. For that I want to use the following formula for the torsional stiffness k: k=GJ/L, G being the shear modulus, L being the beam length and J being the torsional moment of inertia.

Is it correct that I can find the torsional moment of inertia of my component by the following process: 

 

  • conducting a static structural analysis of said component with a fixed support on one end and applying a moment on the other end
  • going into the solution information and searching for the total inertia about center of mass (which represents the inertia tensor)
  • taking the I_zz entry of the tensor (lower right corner) as the torsional moment of inertia around the z axis?Â