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[Aniket]

In Ansys, the torsional stiffness of a joint is indeed a measure of the resistance of a shaft to a twisting or torsional force. This property can be added only for cylindrical and revolute joints: https://ansyshelp.ansys.com/Views/Secured/corp/v232/en/wb_sim/ds_Joints_manual.html

The default value of zero for torsional stiffness implies that the joint is perfectly flexible, which is a common assumption in many engineering analyses when the stiffness of the joint is not the primary concern.

However, if the torsional stiffness of the joint is significant to your analysis, you should input the value you calculated. This could be the case if you are studying the dynamic behavior of the system, or if the joint stiffness could influence the stress distribution or deformation in your component.

In other words, whether you should use the default value or input your own depends on the specifics of your analysis and the importance of the joint stiffness to your results.

-Aniket

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