Question: A solid circular bar ABC consists of two segments, as shown in the figure. One segment has diameter d1 = 56 mm and length L1

A solid circular bar ABC consists of two segments, as shown in the figure. One segment has diameter d1 = 56 mm and length L1 = 1.45 m; the other segment has diameter d2 = 48 mm and length L2 = 1.2 m.
What is the allowable torque Tallow if the shear stress is not to exceed 30 MPa and the angle of twist between the ends of the bar is not to exceed 1.25°? (Assume G = 80 GPa.)

dr di L2 LI

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