MECH ENGINEERING DESIGN(LL)+ACCESS
10th Edition
ISBN: 9781260113952
Author: BUDYNAS
Publisher: MCG
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Chapter 16, Problem 24P
(a)
To determine
The maximum energy fluctuation.
(b)
To determine
The rim weight.
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In drilling a deep oil well the drill shaft, consisting of sections of “drill rod”, is powered from the top, while the load or counter torque is taken off at the bottom. The drill hole is 3 1/2 miles deep. Assuming a solid drill rod of circular cross section and 1 in. diameter, designed to a working shear stress of 5,000 psi, turning at 700 rpm, calculate
(a) The wind-up, i.e. the twist angle between the top and bottom.
(b) The horsepower of the driving motor.
(c) State all assumptions, and comment on the results. What other considerations may have to be taken into account in using this drill?
NOTE: The shear modulus of steel may be taken as 12 x 106 psi. Also 1 mile = 5,280 ft.
An aluminium strip with a cross section of 200 mm × 8 mm is being rolled with 25% reduction of area, using 400 mm diameter steel rolls. The tensile yield stress of aluminium is 0.28 kN/mm2. Calculate i) The angle subtended by the deformation zone at the roll center. ii) The minimum coefficient of friction between the workpiece and the rolls for an unaided bite to be possible.
Two shafts, having axes in the same plate intersecting at an angle of 40°, turn in the same senses at 30 rpm and 100 rpm. Draw a pair of cone to be located on these shafts and turn in pure rolling contact. Diameter of base of smaller cone is 1 in. Calculate the cone angles.
CONE ANGLE 1 (driver):
CONE ANGLE 2 (driven):
Chapter 16 Solutions
MECH ENGINEERING DESIGN(LL)+ACCESS
Ch. 16 - The figure shows an internal rim-type brake having...Ch. 16 - For the brake in Prob. 16-1, consider the pin and...Ch. 16 - In the Figure for Prob. 16-1, the inside rim...Ch. 16 - The figure shows a 400-mm-diameter brake drum with...Ch. 16 - The block-type hand brake shown in the figure has...Ch. 16 - Suppose the standard deviation of the coefficient...Ch. 16 - The brake shown in the figure has a coefficient of...Ch. 16 - Prob. 8PCh. 16 - Prob. 9PCh. 16 - Prob. 10P
Ch. 16 - The maximum band interface pressure on the brake...Ch. 16 - The drum for the band brake in Prob. 1611 is 12 in...Ch. 16 - The brake shown in the figure has a coefficient of...Ch. 16 - The figure depicts a band brake whose drum rotates...Ch. 16 - The figure shows a band brake designed to prevent...Ch. 16 - A plate clutch has a single pair of mating...Ch. 16 - A hydraulically operated multidisk plate clutch...Ch. 16 - Prob. 18PCh. 16 - A cone clutch has D = 12 in, d = 11 in, a cone...Ch. 16 - Prob. 20PCh. 16 - A two-jaw clutch has the dimensions shown in the...Ch. 16 - Prob. 22PCh. 16 - Prob. 23PCh. 16 - Prob. 24PCh. 16 - Using the data of Table 16-6, find the mean output...Ch. 16 - When a motor armature inertia, a pinion inertia,...Ch. 16 - For the conditions of Prob. 1627, make a plot of...Ch. 16 - Prob. 29PCh. 16 - Prob. 30PCh. 16 - Prob. 31P
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