Mechanics of Composites Lecture Outlines
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Questions and Answers

What is a key advantage of single-shell molded structures mentioned in the text?

  • Good mechanical properties
  • Low corrosion tendency
  • Superior strength-to-weight ratio (correct)
  • High thermal stability

    • Which manufacturing technique is associated with advanced composites?

  • Pultrusion, high-modulus glass, phenolic
  • Autoclave curing, prepreg layup, advanced molding processes (correct)
  • Open mold processes, epoxy, bismaleimide
  • Hand layup, open mold processes, pultrusion

    • Why are composites considered tunable according to the text?

  • They are made of fabrics and fibers that can be modified (correct)
  • They provide high energy absorption & impact resistance
  • They are resistant to fatigue/corrosion
  • They have low corrosion tendency

    • What property makes carbon fibers a perfect material for many applications as per the text?

    <p>Negative thermal expansion rate</p> Signup and view all the answers

    Which industry benefits significantly from the low corrosion tendency of composites as mentioned in the text?

    <p>Marine</p> Signup and view all the answers

    What is a key advantage of using high-performance fibers like carbon, aramid, and high-modulus glass in composites?

    <p>Higher specific strength</p> Signup and view all the answers

    Why are composites considered lightweight and strong according to the text?

    <p>They are made of fabrics and fibers</p> Signup and view all the answers

    What makes advanced composites different from traditional composites in terms of manufacturing techniques?

    <p>Autoclave curing and prepreg layup</p> Signup and view all the answers

    Why are composites known for their damping of vibrations as per the text?

    <p>They are made of fabrics and fibers</p> Signup and view all the answers

    What property of carbon fibers makes them a perfect material for many applications according to the text?

    <p>Negative thermal expansion rate</p> Signup and view all the answers

    What is a composite material?

    <p>A material made up of chemically different constituents combined at a microscopic level</p> Signup and view all the answers

    What characterizes advanced composites?

    <p>High performance reinforcements of thin diameter fibers in a matrix material</p> Signup and view all the answers

    Which material is NOT an example of a natural composite?

    <p>Carbon Fiber</p> Signup and view all the answers

    What are the common constituents of fiberglass composite?

    <p>Glass fibers/polymer matrix</p> Signup and view all the answers

    Why are composites considered advantageous for aerospace usage?

    <p>They can reduce weight by 20 to 50%</p> Signup and view all the answers

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