Problem II. The figure below shows the cross-section of a thin-walled shaft subjected to a torque Mr (see the tab of values). If a = 200 mm, t = 20 mm, and G = 77.2 GPa, t I t a T t 2a t T 2a

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.