DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 17, Problem 31RQ
To determine
The two physical phenomena attributed to frictional resistance.
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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. 1CSCh. 17 - Prob. 2CSCh. 17 - Which stainless steel would you recommend? Begin...Ch. 17 - Prob. 4CSCh. 17 - Prob. 5CSCh. 17 - After drawing and perforating, the residual...
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- Lets assume that a block has been kept on a rough floor. We started applying a variable force "F" (assume that the force is being increased) on the block. Draw the graph of Frictional force (Y axis) vs Applied Force (X axis) ! Also tell the peculiar change observed in the latter part of the graph ! Don't Spam, Don't Copy from Internet. Explain Clearly. Thank you ! All the Best :)arrow_forwardOBSERVATIONS 1. Differentiate between static and kinetic friction. 2. Differentiate between rolling and sliding friction. 3. For which combination of materials, the coefficient of static friction is lower? Why? 4. Always rolling friction is greater that sliding friction. True/False CONCLUSIONarrow_forward3. Complete a table similar to that in Experiment No.3. Let weight of block equal to 5.60 N for the first trial; a mass of 200 g is added in the next trial. Consider the following results: Trial 1- applied force for constant velocity is 1.58 N, coefficient of static friction is 0.57; Trial 2- applied force to move object is 4.16 N and 1.97 N to move it at constant velocity. [Use two (2) decimal places].arrow_forward
- Please give answers to both of these parts, thanks (a) Manufacturing is “ the transformation of materials into items of greater value by means of one or more processing and/or assembly operations”. Elaborate on this statement (b) It is not possible to conduct a rolling process without friction. Explain this statement.arrow_forwardWhich of the following is not the characteristic of Friction? Select one: Low for wet and smooth surfaces Low for rough and dry surfaces Friction creates heat High for rough and dry surfacesarrow_forwardWith suitable sketches of the relationship of friction force and applied load, briefly explain the concept of friction force.arrow_forward
- Hellp with thisarrow_forward7. A strip of annealed low-carbon steel (K = 528 MPa, n = 0.25) is rolled from its initial dimensions (210 mm wide and 13 mm thick) to a thickness of 7 mm. The rollers have a radius of 250 mm, the roller rotates at 200 rpm, and u = 0.1. Compare this high frictional force and power with the low frictional (u = 0) forces and power. a. Estimate the roll force and power required for this process.arrow_forward2. Why is the frictional coefficient of materials different from one another?arrow_forward
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