EGR236 Mechanics of Materials
HW Set 13
Spring 2014
Problem 5:43
The 4 hp motor turns the shaft AB at a rate of 1300 rev/min. Determine the maximum shear
stress developed in the shaft within region AB where it has a diameter of 0.5 in and within
region BC where it has a diameter of 0.65 in.
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Solution:
Using
EGR236 Mechanics of Materials
HW Set 13
Spring 2013
Problem 5:49
A motor delivers 500 hp to the steel shaft AB, which is tubular and has an outer diameter of
2 in. If it is rotating at 200 rad/s, determine its largest inner diameter to the nearest 1/8 in. if
the allowable shear stress for the materials τallow = 25 ksi.
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EGR236 Mechanics of Materials
HW Set 13
Spring 2014
Problem 5:49
A motor delivers 500 hp to the steel shaft AB, which is tubular and has an outer diameter of
2 in. If it is rotating at 200 rad/s, determine its largest inner diameter to the nearest 1/8 in. if
the allowable shear stress for the materials τallow = 25 ksi.
EGR236 Mechanics of Materials
Problem 5:53
HW Set 13
Spring 2014
The A-36 steel axle is made from tubes AB and CD and a solid section BC. It is supported
on smooth bearings that allow it to rotate freely. If the ends are subjected to 85 N-m
torques, determine the angle of twist of end A relative to end D. The tubes have an outer
diameter of 30 mm and an inner diameter of 20 mm. The solid section has a diameter of 40
mm.
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EGR236 Mechanics of Materials
HW Set 13
Spring 2014
Problem 5:66
The two A-36 Steel shafts AC and FD are coupled together using the meshed gear
arrangement shown. If A is a fixed support, determine the angle of twist at end F due to the
applied torsional loading. Each shaft has a diameter of 30 mm, and the bearings at F, B, and
G resist no torque.
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