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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Chapter 9, Problem 12P
Hockey sticks are currently available in wood, aluminum, and composites. Wood was the original material, and wooden sticks are still popular today. Aluminum sticks use a tubular (or rectangular tube) aluminum shaft, mated with a traditional wooden blade. Composite sticks have utilized fibers of Kevlar, graphite, or fiberglass in a thermoplastic resin, such as acrylonitrile�butadiene�styrene (ABS).
- Compare the three materials in terms of cost, weight, durability, performance, and other important properties.
- Describe one or more methods that could be used to manufacture the fiber�reinforced composite sticks. Would you want the reinforcement fibers in the shaft only, blade only, or both shaft and blade? How would you achieve your desired configuration?
- Titanium has been proposed as a potentially more attractive alternative. What do you consider to be the pros and cons of titanium? How might it be superior to aluminum?
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Students have asked these similar questions
Classify the types of composite materials based on the matrix and reinforcement materials. Briefly explain the main characteristics of Polymeric Matrix Composites (PMC) and their engineering applications.
Question:What are the advantages and
limitations of the use of composite materials
in engineering applications.Explain in detail.
It is desired to produce an aligned and continuous fiber-reinforced epoxy composite having a
maximum of 50% fibers. A minimum longitudinal modulus of elasticity of 55 GPa and a
minimum tensile strength of 1200 MPa are required. E-glass and carbon (PAN standard
modulus) fibers are the possible candidates to select. In addition, assume the stress levels on
the epoxy matrix at fiber failure are 70 MPa for E-glass fiber and 30MPa for carbon fiber,
respectively. Which fiber meets the design requirement? Use the properties given in the
Table below to evaluate your selection.
Materials
Epoxy matrix
E-glass
Carbon
Modulus of Elasticity (GPa)
3.1
72.5
230
Tensile Strength
(MPa)
69
3450
4000
Chapter 9 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 9 - What is the objective of a manufacturing...Ch. 9 - What are some undesirable features of...Ch. 9 - What problems are created by the availability of...Ch. 9 - In a manufacturing environment, why should the...Ch. 9 - How has the material balance shifted in the...Ch. 9 - How have different materials enabled advances and...Ch. 9 - Discuss the interrelation between engineering...Ch. 9 - What is design?Ch. 9 - What are the three primary stages of product...Ch. 9 - What are some of the features to be considered in...
Ch. 9 - What is the benefit of requiring prototype...Ch. 9 - What sequence of activities is common to nearly...Ch. 9 - Prob. 13RQCh. 9 - What is the most frequent pitfall when seeking to...Ch. 9 - What should be the first step in any materials...Ch. 9 - In what ways does the concept of shape or geometry...Ch. 9 - Prob. 17RQCh. 9 - Describe some of the possible mechanical...Ch. 9 - How might temperature enter into the specification...Ch. 9 - What are some physical properties of materials?Ch. 9 - What are some of the important aspects of the...Ch. 9 - What are some of the possible manufacturing...Ch. 9 - Why is it important to resist jumping to the...Ch. 9 - Prob. 24RQCh. 9 - What is the difference between an absolute and...Ch. 9 - Prob. 26RQCh. 9 - Prob. 27RQCh. 9 - Prob. 28RQCh. 9 - Give an example of a product or component where...Ch. 9 - What are some possible considerations relating to...Ch. 9 - Prob. 31RQCh. 9 - Prob. 32RQCh. 9 - Prob. 33RQCh. 9 - Prob. 34RQCh. 9 - Prob. 35RQCh. 9 - Why might material selection and process selection...Ch. 9 - Give an example of where selection of a material...Ch. 9 - Why is it likely that compromise, opinion, and...Ch. 9 - Why is it likely that multiple individuals will be...Ch. 9 - Why should the design and manufacture of a...Ch. 9 - Give an example where an unexpected problem might...Ch. 9 - Prob. 42RQCh. 9 - What are some of the different types of useful...Ch. 9 - How have high�speed, high�capacity computers...Ch. 9 - Prob. 1PCh. 9 - The chalk tray on a classroom chalkboard has very...Ch. 9 - Prob. 3PCh. 9 - Examine the properties of wood, aluminum, and...Ch. 9 - Automobile body panels have been made from carbon...Ch. 9 - Prob. 6PCh. 9 - Go to the local hardware or building supply store...Ch. 9 - Prob. 8PCh. 9 - Decorative fence posts for a residential home have...Ch. 9 - The individual turbine blades used in the exhaust...Ch. 9 - Prob. 11PCh. 9 - Hockey sticks are currently available in wood,...Ch. 9 - The 2019 Corvette C8 has moved to a mid�engine,...Ch. 9 - What is the normal use or uses of this product or...Ch. 9 - Prob. 2CSCh. 9 - Prob. 3CSCh. 9 - Prob. 4CSCh. 9 - Prob. 5CSCh. 9 - Prob. 6CSCh. 9 - Would there be any concerns relating to...
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- Compute the ultimate strength for a composite which uses Aramid fibers and Polyester matrix. The volume fraction of fibers is 45 % and matrix is 55 %.arrow_forward3. The geometry of the reinforcing phase in a composite greatly determines the overall properties. Polycarbonate has a Modulus of Elasticity=2.2 GPa, Tensile Strength-62.5 MPa. Carbon Fiber has a Modulus of Elasticity=228 GPa, Tensile Strength=3.5 GPa. For a 40 vol% carbon fiber and a 60 vol% polycarbonate matrix composite, compute the Tensile Strength and Young's Modulus for the composite for the following situations. Assume longitudinal loading. a. Continuous and aligned fibers b. Discontinuous and aligned fibers with I> le where 1 = 101, (K = 1). c. Discontinuous and aligned fibers with I< le where I= 0.51, (K = 1). d. Which of these composites is the strongest? Which is the stiffest (has the highest Young's Modulus)?arrow_forwardWhy are composites used in engineering?arrow_forward
- Please solve this mechanical engineering materials course questionarrow_forwardIs it possible to produce a continuous and oriented aramid fiber–epoxy matrix composite havinglongitudinal and transverse moduli of elasticity of 35 GPa and 5.17 Gpa, respectively? Why or why not?Assume that the elastic modulus of the epoxy is 3.4 Gpa.arrow_forwardDescribe three of the functions of the matrix in fibre- reinforced composites. With the aid of sketches compare and contrast the fatigue fracture appearance between an alloy that failed at a low fatigue load and one that failed at a high fatigue load. Propose and briefly describe one non-destructive method that can be used to detect small cracks on the surface of a metallic alloy.arrow_forward
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