Manufacturing Engineering And Technology
7th Edition
ISBN: 9789810694067
Author: Stephen R. Schmid (author) Serope Kalpakjian (author)
Publisher: Pearson Education Orphans
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Textbook Question
Chapter 9, Problem 30QLP
Glass fibers are said to be much stronger than bulk glass. Why is this so?
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Chapter 9 Solutions
Manufacturing Engineering And Technology
Ch. 9 - Distinguish between composites and metal alloys.Ch. 9 - Describe the functions of the matrix and the...Ch. 9 - Name the reinforcing fibers generally used to make...Ch. 9 - What is the range in length and diameter of...Ch. 9 - List the important factors that determine the...Ch. 9 - Comment on the advantages and limitations of...Ch. 9 - What are the most commonly used matrix materials?...Ch. 9 - Describe the advantages of hybrid composites over...Ch. 9 - What material properties are improved by the...Ch. 9 - Describe the purpose of the matrix material.
Ch. 9 - What are the most common types of glass fibers?Ch. 9 - Explain the difference between a carbon fiber and...Ch. 9 - How can a graphite fiber be made electrically and...Ch. 9 - What is a whisker? What is the difference between...Ch. 9 - Describe the composition of boron fibers. Why are...Ch. 9 - Give a succinct definition of fiber, yarn, and...Ch. 9 - How do you think the use of straw mixed with clay...Ch. 9 - What products have you personally seen that are...Ch. 9 - Describe applications that are not well suited for...Ch. 9 - Is there a difference between a composite material...Ch. 9 - Identify metals and alloys that have strengths...Ch. 9 - What limitations or disadvantages do composite...Ch. 9 - Give examples of composite materials other than...Ch. 9 - Explain why the behavior of the materials depicted...Ch. 9 - Explain why fibers are so capable of supporting a...Ch. 9 - Do metal-matrix composites have any advantages...Ch. 9 - Give reasons for the development of ceramic-matrix...Ch. 9 - Explain how you would go about determining the...Ch. 9 - How would you go about trying to determine the...Ch. 9 - Glass fibers are said to be much stronger than...Ch. 9 - Describe situations in which a glass could be used...Ch. 9 - When the American Plains states were settled, no...Ch. 9 - By incorporating small amounts of a blowing agent,...Ch. 9 - Referring to Fig. 9.2c, would there be an...Ch. 9 - Calculate the average increase in the properties...Ch. 9 - In Example 9.1, what would be the percentage of...Ch. 9 - Calculate the percent increase in the mechanical...Ch. 9 - Calculate the stress in the fibers and in the...Ch. 9 - Repeat the calculations in Example 9.1 if (a)...Ch. 9 - Refer to the properties listed in Table 7.1. If...Ch. 9 - Plot the elastic modulus and strength of an...Ch. 9 - For the data in Example 9.1, what should be the...Ch. 9 - It is desired to obtain a composite material with...Ch. 9 - A rectangular cantilever beam, 100 mm high, 20 mm...Ch. 9 - What applications for composite materials can you...Ch. 9 - Using the information given in this chapter,...Ch. 9 - Would a composite material with a strong and stiff...Ch. 9 - Make a list of products for which the use of...Ch. 9 - Inspect Fig. 9.1 and explain what other components...Ch. 9 - Name applications in which both specific strength...Ch. 9 - What applications for composite materials can you...Ch. 9 - As with other materials, the mechanical properties...Ch. 9 - Developments are taking place in techniques for...Ch. 9 - As described in this chapter, reinforced plastics...Ch. 9 - Comment on your observations on the design of the...Ch. 9 - Make a survey of various sports equipment and...Ch. 9 - Several material combinations and structures were...Ch. 9 - It is possible to make fibers or whiskers with a...Ch. 9 - Describe how you can produce some simple composite...Ch. 9 - Gel spinning is a specialized process used in...Ch. 9 - Figure P9.65 shows a section of a...
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- I need the solution of this question,please. Prove that the area fraction equal to volume fraction when using aligned fibers in composite materials.arrow_forwardUsing the ‘rule of mixtures’ calculate the modulus and strength, in the fiber direction and perpendicular to the fiber direction, of a glass fiber-epoxy composite plate, given that the weight fraction of glass fiber is 40%. The modulus of the glass fiber is 60 GPa, and the modulus of the epoxy is 3 GPa. The density of glass fiber is 2300 kg/m^3 and the density of epoxy is 1300 kg/m^3. Calculate the tensile strength of the composite using rule of mixtures in the fiber direction given that the tensile strength of the glass fiber is 1 GPa and the epoxy is 70 GPa.arrow_forwardIllustrate the difference between crystalline and amorphous polymers structure and explain the effect of this difference on their properties and applications. Show examples of polymers that are not crystalline or semi-crystalline.arrow_forward
- Are there polymers that have glass transition temperature lower than room temperature? If so, what does this mean for their state at 20°C?arrow_forwardThe compressive strength of aramid fiber is about one-eighth of its tensile stress. Estimate the smallest diameter of a rod on which the aramid fiber can be wound without causing kinks, etc. on its compression side.arrow_forwardWhat is Gorilla Glass from Corning? Why does it outperform regular window glass in terms of mechanical properties? Briefly explain utilizing basic mechanical principles. When necessary, provide diagrams to further explain your response.arrow_forward
- Calculate the softening temperature for soda lime silica glass at which the viscosity is 10^1 pa.s .If the activation energy for the viscous flow is 250kj/mol and the viscosity at 1759 degrees Celsius is 10^1 pa.sarrow_forwardAn epoxy matrix is reinforced with 40 vol% E-glass fibers to produce a 2-cm diametercomposite that is to withstand a load of 25,000 N. Calculate the stress acting oneach fiber.arrow_forwardQuestion: What are the main factors influencing the glass transition temperature (Tg) of a tough polymer, and how do they affect the mechanical properties?arrow_forward
- Alice is conducting a tensile test on continuous fiber alignment compositesamples. She found that the results are different in the longitudinal andtransverse directions of the samples. Explain why this happens with the aid ofdiagram.arrow_forwardIf the tensile strength of the Kevlar 49 fibers is 3.8 GPa and that of the epoxy resin is 75.9 MPa, calculate the tensile strength of the composite material in Q3b(i). Calculate the fraction of load carried by the Kevlar 49.arrow_forwardCan anyone please explain? This is all that is given. TIA... Determine the % weight savings that would occur if a steel drive shaft were replaced with a carbon/epoxy drive shaft. The carbon/epoxy composite is 60% carbon fibers (density=1.80 g/cc). Assume the volume of the drive shaft is the same for both the steel and the composite drive shaft.arrow_forward
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