Question: A stepped shaft of solid circular cross sections (see figure) has length L = 45 in., diameter d2 = 1.2 in., and diameter d1 =

A stepped shaft of solid circular cross sections (see figure) has length L = 45 in., diameter d2 = 1.2 in., and diameter d1 = 1.0 in. The material is brass with G = 5.6 ( 106 psi.
Determine the strain energy U of the shaft if the angle of twist is 3.0°.

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