Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 17, Problem 39RQ
What is an acceptable definition of hot working? Is a specific temperature involved?
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4. An impeller rotating at 1150 rpm has the following data: b, = 1 ¼ in., b2 = ¾ in., d, = 7 in., d2 =
15 in., B1 = 18", B2 = 20°, cross-sectional area A = Db if vane thickness is neglected. Assuming radial inlet flow, determine the theoretical
capacity in gpm
head in ft
horsepower
5. If the impeller in Problem (4) develops an actual head of 82 ft and delivers 850 gpm at the point of maximum efficiency and requires 22 BHP. Determine
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virtual velocities V2 and W2
(30 pts) Problem 1
A thin uniform rod of mass m and length 2r rests in a smooth hemispherical bowl of radius r. A
moment M
mgr
4
is applied to the rod. Assume that the bowl is fixed and its rim is in the
horizontal plane.
HINT: It will help you to find the length l of that portion of the rod that remains outside the
bowl.
M
2r
a) How many degrees of freedom does this system have?
b) Write an equation for the virtual work in terms of the angle 0 and the motion of the
center of mass (TF)
c) Derive an equation for the variation in the position of the center of mass (i.e., Sŕƒ)
a. HINT: Use the center of the bowl as the coordinate system origin for the problem.
d) In the case of no applied moment (i.e., M 0), derive an equation that can be used to
solve for the equilibrium angle of the rod. DO NOT solve the equation
e) In the case of an applied moment (i.e., M
=
mgr
= -) derive an equation that can be used to
4
solve for the equilibrium angle of the rod. DO NOT solve the equation.
f) Can…
Please show all work step by step
Chapter 17 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 17 - What is plasticity?Ch. 17 - What are some of the general assets of the...Ch. 17 - Why might large production quantities be necessary...Ch. 17 - What types of deformation may occur in forming...Ch. 17 - What is an independent variable in a...Ch. 17 - What are some considerations regarding selection...Ch. 17 - What is the significance of tool and die geometry...Ch. 17 - Why is lubrication often a major concern in metal...Ch. 17 - What are some of the secondary effects that may...Ch. 17 - Prob. 10RQ
Ch. 17 - Why is it important to be able to predict the...Ch. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - Prob. 14RQCh. 17 - Prob. 15RQCh. 17 - Prob. 16RQCh. 17 - Prob. 17RQCh. 17 - What are some of the features that may be...Ch. 17 - What features have contributed to the expanded use...Ch. 17 - What are some of the uses or applications of...Ch. 17 - Prob. 21RQCh. 17 - Prob. 22RQCh. 17 - Prob. 23RQCh. 17 - What type of information about the material being...Ch. 17 - Prob. 25RQCh. 17 - Why is friction such an important parameter in...Ch. 17 - Why are friction effects in metalworking difficult...Ch. 17 - Prob. 28RQCh. 17 - Prob. 29RQCh. 17 - Prob. 30RQCh. 17 - Prob. 31RQCh. 17 - Discuss the significance of wear in metal forming:...Ch. 17 - Lubricants are often selected for properties in...Ch. 17 - What is tribology?Ch. 17 - What are some of the common types of metal forming...Ch. 17 - What is hydrodynamic lubrication? What are some of...Ch. 17 - If the temperature of a material is increased,...Ch. 17 - Define the various regimes of cold working, warm...Ch. 17 - What is an acceptable definition of hot working?...Ch. 17 - What are some of the attractive manufacturing and...Ch. 17 - What are some of the negative aspects of hot...Ch. 17 - Prob. 42RQCh. 17 - Prob. 43RQCh. 17 - If the deformed grains recrystallize during hot...Ch. 17 - Why might a rolled thread offer improved strength...Ch. 17 - How might the temperature of a deforming workpiece...Ch. 17 - Why are heated dies or tools often employed in...Ch. 17 - What generally restricts the upper temperature to...Ch. 17 - What is the primary cause of residual stresses in...Ch. 17 - What is cold working?Ch. 17 - Compared to hot working, what are some of the...Ch. 17 - What are some of the disadvantages of...Ch. 17 - How could cold working be used to reduce the cost...Ch. 17 - Why are cold�forming processes best suited for...Ch. 17 - How can the tensile test properties of a metal be...Ch. 17 - Why is elastic springback an important...Ch. 17 - What is pickling, and how does it remove surface...Ch. 17 - Prob. 58RQCh. 17 - What engineering properties are likely to decline...Ch. 17 - Prob. 60RQCh. 17 - Prob. 61RQCh. 17 - Prob. 62RQCh. 17 - What are some of the advantages of warm forming...Ch. 17 - Prob. 64RQCh. 17 - What material feature is considered to be the...Ch. 17 - Why is isothermal forming considerably more...Ch. 17 - Prob. 67RQCh. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - List and discuss the various economic factors that...Ch. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 1.1CSCh. 17 - Prob. 1.2CSCh. 17 - Which stainless steel would you recommend? Begin...Ch. 17 - Prob. 1.4CSCh. 17 - Prob. 1.5CSCh. 17 - After drawing and perforating, the residual...Ch. 17 - One of the blades has struck a rock and is badly...Ch. 17 - A second propeller, identical to the one above,...
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