Manufacturing Processes for Engineering Materials 5th Edition

length gives the deflection asd=P L33EI=(100 N)(1 m)33 (8.79 105mm4)1EProduct PolymersBearings Acetals, fluorocarbons, nylon,polyimidesGears Acetals, nylon, polyester,polyimidesCams Acetals, polyesterLenses Acrylics, cellulosics,polycarbonatesFurniture Acrylics, polystyrene length gives the deflection asd=P L33EI=(100 N)(1 m)33 (8.79 105mm4)1EProduct PolymersBearings Acetals, fluorocarbons, nylon,polyimidesGears Acetals, nylon, polyester,polyimidesCams Acetals, polyesterLenses Acrylics, cellulosics,polycarbonatesFurniture Acrylics, polystyrene length gives the deflection as d=P L3 3EI =(100

Chapter 10 Properties and Processing of Polymers and Reinforced Plastics; Rapid Prototyping and Rapid Tooling Questions 10.1 Summarize the most important mechanical and physical properties of plastics in engineering ap- plications.The most important mechanical and physicalproperties of plastics are described in Sections10.3 through 10.8. Students may create sum-By the student. As described in Section 10.2.1,the degree of

Chapter 11 Properties and Processing of Metal Powders, Ceramics, Glasses, Composites, and Superconductors Questions Powder metallurgy 11.1 Explain the advantages of blending different metal powders. Metal powders are blended for the following ba-sic reasons:parts can be produced with high density to netor near-net shape. Metal powders are blended for the following ba-sic reasons:parts can be produced with high density

Chapter 12 Joining and Fastening Processes Questions 12.1 Explain the reasons that so many different welding processes have been developed.A wide variety of welding processes have beendeveloped for several reasons. There are manytypes of metals and alloys with a wide range of(b) requires assembly;(c) weaker in shear; and(d) more likely to loosen (bolted connections). welding

12.73 If a built-up weld is to be constructed (see Fig. 12.5), should all of it be done at once, or should it be done a little at a time, with suffi- cient time allowed for cooling between beads? With proper welding techniques (see also slaginclusions in Section 12.6.1) and care, the weldjoint can

Chapter 13 Fabrication of Microelectronic, Micromechanical, and Microelectromechanical Devices; Nanomanufacturing Questions 13.1 Define the terms wafer, chip, device, integrated circuit, and surface mount.A wafer is a slice of a thin cylinder of silicon.A chip is a fragment of a wafer. A deviceis either a (1) micromechanical arrangementwithout any integrated electronic circuitry or aplain.The difference is whether or

increases and reaches the yield stress, Y. Thecompressive stress is first reduced in magnitude,then becomes tensile. Eventually, the wholecross section reaches the constant yield stress,Y. Because we now have a uniform stress dis-tribution throughout its thickness, the bar be-comes straight and remains straight upon un-loading.affect yielding. In other words, the

Chapter 2 Fundamentals of the Mechanical Behavior of Materials Questions 2.1 Can you calculate the percent elongation of ma- terials based only on the information given in Fig. 2.6? Explain. Recall that the percent elongation is defined byEq. (2.6) on p. 33 and depends on the originalgage length (lo) of the specimen. From Fig. 2.6strains becomes larger

Chapter 3 Structure and Manufacturing Properties of Metals Questions 3.1 What is the difference between a unit cell and a single crystal? A unit cell is the smallest group of atomsshowing the characteristic lattice structure ofa particular metal. A single crystal consistsof a number of unit cells; some examples arewhiskers, chips for semiconductor devices, andturbine blades.tic

Chapter 4 Surfaces, Tribology, Dimensional Characteristics, Inspection, and Product Quality Assurance Questions 4.1 Explain what is meant by surface integrity. Why should we be interested in it? Whereas surface roughness describes the geo-metric features of a surface, surface integrityconsists of not only the geometric descriptionbut also the mechanical and metallurgical prop-erties and characteristics. As described in Sec-(c)

Chapter 5 Metal-Casting Processes and Equipment; Heat Treatment Questions 5.1 Describe the characteristics of (1) an alloy, (2) pearlite, (3) austenite, (4) martensite, and (5) cementite. (a) Alloy: composed of two or more elements,at least one element is a metal. The al-loy may be a solid solution or it may formintermetallic compounds.(b) Pearlite: a two-phase aggregate consistingof

Note that hois the location of the bottom ofthe sprue and that the sprue is axisymmetric.The sprue shape, based on this curve, is shownbelow.4 in1 in12 in5.68 Estimate the clamping force for a diecastingmachine in which the casting is rectangular,with projected dimensions of 75 mm x 150 mm.Would your answer

hammer stops at a certain height of the spec-imen. Establish quantitative relationships be-tween workpiece height and velocity, and makea qualitative sketch of the velocity profile of thehammer. (Hint: The loss in the kinetic energyof the hammer is the plastic work of deforma-tion; thus, there is a direct relationship betweenworkpiece height

Chapter 6 Bulk Deformation Processes Questions Forging 6.1 How can you tell whether a certain part is forged or cast? Describe the features that you would investigate to arrive at a conclusion.Numerous tests can be used to identify cast vs.forged parts. Depending on the forging temper-ature, forged parts are generally tougher thancast parts, as can be

Whereas Problem 7.67 pertained to a strain-hardening material, in this problem the truestress is a constant at Yregardless of themagnitude of strain. Inspecting the table in theanswer, we note that as the downward travel,d, increases, Fmust increase as well becausethe rate of increase in the term (sin + sin )

Chapter 7 Sheet-Metal Forming Processes Questions 7.1 Select any three topics from Chapter 2, and, with specific examples for each, show their rel- evance to the topics described in this chapter. This is an open-ended problem, and studentscan develop a wide range of acceptable answers.Some examples are:cating materials that can be cold rollinginto sheets. This is an

Chapter 8 Material-Removal Processes: Cutting Questions 8.1 Explain why the cutting force, Fc, increases with increasing depth of cut and decreasing rake angle.(a) Increasing the depth of cut means morethe tendency for BUE formation, which leadsto poor surface finish. rake angle.(a) Increasing the depth of cut means morethe tendency for BUE formation, which leadsto poor surface

From Problem 8.110, we note that V= 2 m/s =2000 mm/s and to= 0.13 mm. Equation (8.29) canbe used to calculate the temperature rise, but theequation requires English units. It can be shownthat the equivalent form of Eq. (8.29) for SI unitsisrV to= 1.01, so that = tan = 45.4.

operation is being carried out on a long work-piece and at a constant workpiece speed, v. Ob-tain an expression for estimating the linear dis-tance ground on the workpiece before the wheelor m= 1.78 105kg. Therefore, fromEq. (9.13),Fave =2mv=2(1.78 105)(4.43) operation is being carried out on a long work-piece and at a

Chapter 9 Material-Removal Processes: Abrasive, Chemical, Electrical, and High-Energy Beams Questions 9.1 Why are grinding operations necessary for parts that have been machined by other processes? The grinding operations are necessary for sev-eral reasons, as stated in Section 9.1. For ex-ample, the hardness and strength of the work-piece may be too high to be machined to fi-nal