Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 6, Problem 30QTP
Plot the following for the materials described in this chapter: (a) yield strength versus density, (b) modulus of elasticity versus strength, (c) modulus of elasticity versus relative cost, and (d) electrical conductivity versus density.
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The tensile strength and number-average molecular weight for two poly(methyl methacrylate)
materials are as follows:
Tensile Strength (MPa) Number-Average Molecular Weight (g/mol)
66
30,000
160
50,000
Estimate the tensile strength (MPa) at a number-average molecular weight of 34,000 g/mol.
Express your answer
three significant figures.
Answer:
1) Draw (using a normal graph paper) a conventional
stress-strain diagram for ANY metallic material (e.g. steel,
aluminium, copper, brass, iron, tungsten). The diagram
should be as accurate as possible using a suitable scale
(e.g. 1cm: 10 N).
2) Calculate the Modulus of Elasticity, Modulus of
Toughness and Modulus of Resilience for the material
from the stress-strain diagram. Show your calculations in
detail on a separate A4 piece of paper.
Let's translate and analyze the statements:
The materials, for convenience, are separated into classes based on their constitution, arrangement of their atoms, and their properties. These classes, or groups, are:
Metals or metallic materials.
Ceramics or ceramic materials.
Polymers or polymeric materials.
Composites or composite materials.
Each of these classes has materials with structures and properties different from the other classes.
(CALLISTER JR., W. D.; RETHWISCH, D. G. Materials Science and Engineering: An Introduction. 8th ed. Rio de Janeiro: LTC Publisher, 2013).
Regarding the characteristics and properties of materials and considering their classification, judge the following statements:
The class of metallic materials comprises those materials characterized by a wide range of melting temperatures and stiffness, as well as good thermal and electrical conductivity.
Ceramic materials are notably characterized by their high melting temperatures and stiffness, which is…
Chapter 6 Solutions
Manufacturing Engineering & Technology
Ch. 6 - Given the abundance of aluminum in the Earths...Ch. 6 - Prob. 2RQCh. 6 - What are the major uses of copper? What arc the...Ch. 6 - What are superalloys? Why are they so named?Ch. 6 - What properties of titanium make it attractive for...Ch. 6 - Which properties of each of the major refractory...Ch. 6 - Prob. 7RQCh. 6 - What it the composition of (a) babbitts, (b)...Ch. 6 - Name the materials described in this chapter that...Ch. 6 - What are the major uses of gold and silver, other...
Ch. 6 - Describe the advantages to using zinc as a coating...Ch. 6 - Prob. 12RQCh. 6 - Why are aircraft fuselages made of aluminum...Ch. 6 - How is metal foam produced?Ch. 6 - What metals have the lowest melting points? What...Ch. 6 - Explain why cooking utensils generally are made of...Ch. 6 - Would it be advantageous to plot the data in Table...Ch. 6 - Compare the contents of Table 6.3 with those in...Ch. 6 - What factors other than mechanical strength should...Ch. 6 - Prob. 20QLPCh. 6 - If aircraft, such as a Boeing 757, are made of 79%...Ch. 6 - Prob. 22QLPCh. 6 - Most household wiring is made of copper wire. By...Ch. 6 - The example in this chapter showed the benefits of...Ch. 6 - If tungsten is the highest melting-point metal,...Ch. 6 - A simply supported rectangular beam is 25 mm wide...Ch. 6 - Obtain a few aluminum beverage cans, cut them, and...Ch. 6 - Beverage cans usually are stacked on top of each...Ch. 6 - Using strength and density data, determine the...Ch. 6 - Plot the following for the materials described in...Ch. 6 - Prob. 33SDPCh. 6 - Give some applications for (a) amorphous metals,...Ch. 6 - Describe the advantages of making products with...Ch. 6 - In the text, magnesium was described as the...Ch. 6 - Prob. 38SDPCh. 6 - Review the technical literature, and write a...
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- Illustrate the shear stress vs shear strain relationship of the following materials: Ethanol, juice concentrate, Quick sand, blood, glycerin, ketchup and corn starcharrow_forwardBuild a table with all the mechanical properties presented and discussed in Callister and in the video classes. In the first column, indicate the properties (examples: Modulus of Elasticity, Poisson's Ratio, Tenacity, Ductility, Fracture Tenacity, Flow Stress, etc.) and in the second column explain each one. (maximum one page)arrow_forwardConsidering the stress-strain relationship, develop the following questions: (a) Sketch a schematic conventional stress-strain diagram, indicating the regions present in the diagram and the points that represent properties of both the elastic and plastic behavior and explain these properties. (b) What distinguishes the diagram in question a) from an actual stress-strain diagram? (c) What differentiates a brittle material and a ductile material, and how this will influence their respective stress-strain diagramsarrow_forward
- theory of elasticityarrow_forwardPlease make brief and clear definitions of the terms below. 1.Stress, Strain2.Elastic Deformation3.Plastic Deformation4. Young Modulus5. Yield Strenghtarrow_forwardExplain why the behaviour of materials is considered such an important factor when selecting a material for a given product or application.arrow_forward
- A student conducted an experiment to determine the behavior of poly (ethylene) and poly (tetrafluo-roethylene) to stress. The tables below depict the results of his experiments. Part 1.1Plot the stress-strain curves for both types of material. Calculate their respective Young’s moduli (E). Howdo they compare? Part 1.2From their respective plots, determine their approximate strain energy before plastic deformation begins.How do they compare? Part 1.3What do these calculations of young’s modulus and strain energy tell us about the properties of bothmaterials? Compare the properties of both materials using these calculations.arrow_forwardA Cotton fiber, initially 2.2 cm long, is being stretched to its maximum known strain. What would be its final length, in cm, before rupture?arrow_forwardList at least three other names for the material derivative, and write a brief explanation about why each name is appropriate.arrow_forward
- Using a stress-strain diagram, analyze and compare the mechanical properties of cast iron, mild steel and glass materialsarrow_forward1. Sketch stress-strain curves for the following three materials (mechanically worked tungsten metal, annealed tungsten metal, and tungsten carbide) on the same plot. On each curve, label the following: ultimate compressive strength (UCS), yield stress (YS), modulus of elasticity (E), and rupture stress (RS).arrow_forward1. Draw the stress-strain diagram and mark the regions. How can you use stress-strain diagrams in selecting the most appropriate material for an orthopedic biomaterial?arrow_forward
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