For a shaft subject to torsional stress, which statement is correct?Group of answer choicesAt the center of the shaft, torsional stress is maximum.Torsional stress does not depend on the applied torque.Torsional stress gradually decreases from the top surface towards the center of the shaft.Torsional stress does not depend on the radius of the shaft.
Question
For a shaft subject to torsional stress, which statement is correct?Group of answer choicesAt the center of the shaft, torsional stress is maximum.Torsional stress does not depend on the applied torque.Torsional stress gradually decreases from the top surface towards the center of the shaft.Torsional stress does not depend on the radius of the shaft.
Solution
The correct statement is: Torsional stress gradually decreases from the top surface towards the center of the shaft.
In a shaft subjected to torsional stress, the stress is maximum at the outer surface and decreases linearly to zero at the center. This is because the outer fibers of the shaft are subjected to the greatest strain and stress due to the twisting action, while the fibers at the center of the shaft experience little to no torsional stress.
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