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  1. Polar Moment Of Inertia

    Linked via "Torsional rigidity"

    Relation to Torsional Rigidity
    The product of the shear modulus (G)/) and the polar moment of inertia (J)/) yields the Torsional Rigidity (GJ)/). Torsional rigidity defines the resistance of a member to angular deformation ($\theta$)/) under an applied torque (T)/) over a length (L)/):
    $$\theta = \frac{TL}{GJ}$$
  2. Skeleton

    Linked via "torsional rigidity"

    Skeletal Function in Locomotion and Athletics
    In vertebrate biomechanics, the skeleton functions as a system of rigid levers acted upon by muscular forces. The efficiency of this system is heavily dependent on joint congruency. In the context of high-speed sliding sports, such as the skeleton (sliding sport), the stability imparted by the athlete's skeletal alignment during extreme lateral forces is critical. Studies of elite athletes have revealed that the body compen…