Page 253 - 04. Subyek Engineering Materials - Manufacturing, Engineering and Technology SI 6th Edition - Serope Kalpakjian, Stephen Schmid (2009)
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232 Chapter 9 Composite Materials: Structure, General Properties. and Applications
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Reinforced Plastics, Noyes Publications, 1995. Marcel Dekker, 1995.
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Carbon/Carbon Composites, Springer, 1998. with Plastics and Composites: A Handbook, Van
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REVIEW QUESTIONS
9.l. Distinguish between composites and metal alloys. 9.8. Describe the advantages of hybrid composites over
9.2. Describe the functions of the matrix and the reinforc- other composites.
ing fibers. What fundamental differences are there in the 9.9. What material properties are improved by the addition
characteristics of the two materials? of reinforcing fibers?
9.3. Name the reinforcing fibers generally used to make 9.l0. Describe the purpose of the matrix material.
composites. Which type of fiber is the strongest? Which type 9.l I. What are the most common types of glass fibers?
is the weakest?
9.12. Explain the difference between a carbon fiber and a
9.4. What is the range in length and diameter of typical re- graphite fiber.
inforcing fibers?
9.l3. How can a graphite fiber be made electrically and
9.5. List the important factors that determine the properties thermally conductive?
of reinforced plastics.
9.14. What is a Whisker? What is the difference between a
9.6. Comment on the advantages and limitations of metal- whisker and a fiber?
matrix composites, reinforced plastics, and ceramic-matrix
9.15. Explain the composition of boron fibers. Why are
composites.
they heavy?
9.7. What are the most commonly used matrix materials?
Why?
QUALITATIVE PROBLEMS
9.16. How do you think the use of straw mixed with clay 9.2|. What limitations or disadvantages do composite ma-
originally came about in making brick for dwellings? terials have? What suggestions would you make to overcome
9.|7. What products have you personally seen that are the limitations?
made of reinforced plastics? How can you tell? 9.22. Give examples of composite materials other than
9.l8. Describe applications that are not well suited for those stated in this chapter.
composite materials. 9.23. Explain why the behavior of the materials depicted in
9.| 9. ls there a difference between a composite material and Fig. 9.5 is as shown.
a coated material? Explain. 9.24. Explain why fibers are so capable of supporting a
9.20. Identify metals and alloys that have strengths compa- major portion of the load in composite materials.
rable to those of reinforced plastics.
