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ISSUES TO ADDRESS...

2. Composites. Combine materials with the objective of getting a more desirable combination of propertiesEx: get flexibility

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ISSUES TO ADDRESS...

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    1. 1 Chapter 16: Composite Materials

    2. 2 Composites Combine materials with the objective of getting a more desirable combination of properties Ex: get flexibility & weight of a polymer plus the strength of a ceramic Path of nature ! Many new technologies require unusual combinations of properties, ie aerospace, automotive and underwater etc… Principle of combined action Mixture gives “averaged” properties Don’t always get what you want Ex: combine ferret (pet) + mink (fur) Desire a mink with good disposition but got a nasty ferret Don’t always get what you want Ex: combine ferret (pet) + mink (fur) Desire a mink with good disposition but got a nasty ferret

    3. 3 Composites : getting the best of all worlds

    4. 4 Talking about Bones

    5. 5 Terminology/Classification

    6. 6 Composite Survey

    7. 7 Composite Survey: Particle-I

    8. 8 Composite Survey: Particle-II

    9. 9 Composite Survey: Particle-III

    10. 10 Composite Survey: Fiber-I

    11. 11 Composite Survey: Fiber-II

    12. 12 Fiber Alignment

    13. 13 Composite Survey: Fiber-III

    14. 14 Composite Survey: Fiber-IV

    15. 15

    16. 16 How does fiber reinforcement work ?

    17. 17 Composite Survey: Fiber-V

    18. 18

    19. 19 Composite Strength:Longitudinal Loading Assume Continuous fibers - Estimate fiber-reinforced composite strength for long continuous fibers in a matrix Assume fiber/matrix bond is strong => isostrain Longitudinal deformation ?c = ?mVm + ?fVf but ?c = ?m = ?f volume fraction isostrain

    20. 20 Example Problem 16.1

    21. 21 Composite Strength: Transverse Loading In transverse loading the fibers carry less of the load - isostress ?c = ?m = ?f = ? ?c= ?mVm + ?fVf

    22. 22 Composite Strength

    23. 23 Particle Reinforcement

    24. 24 Composite Production Methods-I Pultrusion Continuous fibers pulled through resin tank, then preforming die & oven to cure

    25. 25 Composite Survey: Structural

    26. 26 Composite Production Methods-II Filament Winding Ex: pressure tanks Continuous filaments wound onto mandrel

    27. 27 Composite Benefits

    28. 28 Summary

    29. 29 ANNOUNCEMENTS

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