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

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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). - PowerPoint PPT Presentation

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Page 1: 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

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

– Feyman

Page 2: Do not read so much, look about you and think of what you see there – Feyman

Crystal whiskers - SiC Crystal whiskers - SiC

Page 3: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Page 4: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Page 5: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Page 6: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Page 7: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Fibers:mainly - glass (GFRPs), carbon (CFRPs),

aramid,others - B, SiC, Al2O3

Page 8: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Carbon fibers frequently used as woven fabrics impregnated with an epoxyCarbon fibers frequently used as woven fabrics impregnated with an epoxy

Page 9: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Page 10: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Woven carbon fiber fabrics in auto industry -Woven carbon fiber fabrics in auto industry -

2006 BMW M6 - roof (unpainted)2006 BMW M6 - roof (unpainted)

'vette Z06 - front fenders, wheel wells, floor'vette Z06 - front fenders, wheel wells, floorPorsche Carrera GT ($440,000) - framePorsche Carrera GT ($440,000) - frame

Scion accessories - gear shift knob ($49), fuel-filler door ($39), roof pillar appliqués ($75-189), etc.

Scion accessories - gear shift knob ($49), fuel-filler door ($39), roof pillar appliqués ($75-189), etc.

Page 11: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs) MatrixMatrix

Page 12: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Very common - polyesters, vinyl estersVery common - polyesters, vinyl esters

Page 13: Do not read so much, look about you and think of what you see there – Feyman

CompositesComposites

Role of matrix in FR composites:a. transfer stresses betwn fibersb. provide barrier to environmentc. protect fibers

Role of matrix in FR composites:a. transfer stresses betwn fibersb. provide barrier to environmentc. protect fibers

Matrix/fiber bond:matrix must wet fiber physical & chemical bond desirablemechanical interlocking

Matrix/fiber bond:matrix must wet fiber physical & chemical bond desirablemechanical interlocking

Fibers frequently coated w/ coupling agentFibers frequently coated w/ coupling agent

Page 14: Do not read so much, look about you and think of what you see there – Feyman

non-couplednon-coupled

CompositesComposites

coupledcoupled

Page 15: Do not read so much, look about you and think of what you see there – Feyman

CompositesComposites

Fibers - variablesamountfiber lengthdistributionorientation

Fibers - variablesamountfiber lengthdistributionorientation

Page 16: Do not read so much, look about you and think of what you see there – Feyman

CompositesComposites

Fibers - variablesamountfiber lengthdistributionorientation

Fibers - variablesamountfiber lengthdistributionorientation

Fiber orientation can berandom aligned intermediate

Fiber orientation can berandom aligned intermediate

Page 17: Do not read so much, look about you and think of what you see there – Feyman

CompositesComposites

Page 18: Do not read so much, look about you and think of what you see there – Feyman

CompositesComposites

Page 19: Do not read so much, look about you and think of what you see there – Feyman

Assignment:

Review today's classnotes

a. PMCs - fibersb. vinyl estersc. matrix/fiber bondd. fiber characteristics &

behavior

Read pp. 538-563

Assignment:

Review today's classnotes

a. PMCs - fibersb. vinyl estersc. matrix/fiber bondd. fiber characteristics &

behavior

Read pp. 538-563

Page 20: Do not read so much, look about you and think of what you see there – Feyman

Composites - polymer matrix composites (PMCs) Composites - polymer matrix composites (PMCs)

Role of matrix in FR composites:a. transfer stresses betwn fibersb. provide barrier to environmentc. protect fibers

Role of matrix in FR composites:a. transfer stresses betwn fibersb. provide barrier to environmentc. protect fibers

Slow crack growthdeflect crack tipsredistribute stresses around crack

tipsbridge crack tips

Slow crack growthdeflect crack tipsredistribute stresses around crack

tipsbridge crack tips


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