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Do not read so much, look about you and think of what you see there 
 – Feyman

Do not read so much, look about you and think of what you see there 
 – Feyman. Crystal whiskers - SiC. Composites - polymer matrix composites (PMCs). Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al 2 O 3. Composites - polymer matrix composites (PMCs).

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Do not read so much, look about you and think of what you see there 
 – Feyman

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  1. Do not read so much, look about you and think of what you see there 
 – Feyman

  2. Crystal whiskers - SiC

  3. Composites - polymer matrix composites (PMCs) Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al2O3

  4. Composites - polymer matrix composites (PMCs) Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al2O3

  5. Composites - polymer matrix composites (PMCs) Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al2O3

  6. Composites - polymer matrix composites (PMCs) Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al2O3

  7. Composites - polymer matrix composites (PMCs) Fibers: mainly - glass (GFRPs), carbon (CFRPs), aramid, others - B, SiC, Al2O3

  8. Composites - polymer matrix composites (PMCs) Carbon fibers frequently used as woven fabrics impregnated with an epoxy

  9. Composites - polymer matrix composites (PMCs)

  10. Composites - polymer matrix composites (PMCs) Woven carbon fiber fabrics in auto industry - 2006 BMW M6 - roof (unpainted) 'vette Z06 - front fenders, wheel wells, floor Porsche Carrera GT ($440,000) - frame Scion accessories - gear shift knob ($49), fuel-filler door ($39), roof pillar appliqués ($75-189), etc.

  11. Composites - polymer matrix composites (PMCs) Matrix

  12. Composites - polymer matrix composites (PMCs) Very common - polyesters, vinyl esters

  13. Composites Role of matrix in FR composites: a. transfer stresses betwn fibers b. provide barrier to environment c. protect fibers Matrix/fiber bond: matrix must wet fiber physical & chemical bond desirable mechanical interlocking Fibers frequently coated w/ coupling agent

  14. non-coupled coupled Composites

  15. Composites Fibers - variables amount fiber length distribution orientation

  16. Composites Fibers - variables amount fiber length distribution orientation Fiber orientation can be random aligned intermediate

  17. Composites

  18. Composites

  19. Assignment: Review today's classnotes a. PMCs - fibers b. vinyl esters c. matrix/fiber bond d. fiber characteristics & behavior Read pp. 538-563

  20. Composites - polymer matrix composites (PMCs) Role of matrix in FR composites: a. transfer stresses betwn fibers b. provide barrier to environment c. protect fibers Slow crack growth deflect crack tips redistribute stresses around crack tips bridge crack tips

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