Homework 4
Strength of Materials
Spring 2017
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1. The solid 50-mm-diameter shaft is used to transmit the torques applied to the gears.
Determine the absolute maximum shear stress in the shaft.
2. The 20-mm-diameter A-36 steel shaft is subjected to the torques shown. Determine the angle
of twist of the end B.
3. The splined ends and gears attached to the A-36 steel shaft are subjected to the torques
shown. Determine the angle of twist of end B with respect to end A. The shaft has a diameter
of 40 mm.
4. The rotating flywheel and shaft is brought to a sudden stop at D when the bearing freezes.
This causes the flywheel to oscillate clockwise–counterclockwise, so that a point A on the
outer edge of the flywheel is displaced through a 10-mm arc in either direction. Determine
the maximum shear stress developed in the tubular 304 stainless steel shaft due to this
oscillation. The shaft has an inner diameter of 25 mm and an outer diameter of 35 mm. The
journal bearings at B and C allow the shaft to rotate freely. (
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