PROBLEM 3.107 For the shaft of Prob. 3.106, determine (a) angle of twist at which the section first becomes fully plastic, (b) the corresponding magnitude T of the applied torque. Sketch the T-? curve for the shaft. PROBLEM 3.106 The hollow shaft shown is made of steel which is assumed to be elastoplastic with ?Y = 145 MPa and G = 77.2 GPa. Determine the magnitude T of the torque and the corresponding angle of twist (a) at the onset of yield, (b) when the plastic zone is 10 mm deep.
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