Composites - polymer matrix composites (PMCs)

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Composites - polymer matrix composites (PMCs)
Matrix
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Composites - polymer matrix composites (PMCs)
Very common - polyesters, vinyl esters
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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
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Composites
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Composites
Fibers - variables amount fiber
length distribution orientation
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Composites
Fibers - variables amount fiber
length distribution orientation
Fiber orientation can be random aligned
intermediate
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Composites
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Composites
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Materials selection - some considerations
Economics Environmental Political Market Aesthetic
s Material properties
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Materials selection - material cost
Relative cost - compared to that of hot rolled
ASTM A36 plate (0.29C-1Mn-0.28Si) (unit wt.
basis)
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Materials selection - environmental
Health hazards Recycling
Metals particularly suited to recycling - can be
easily sorted, remelted, shaped
Ceramics usually not recycled - many polymers are
Composites difficult to recycle - difficult to
separate fibers from matrix
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Materials selection - political
Who writes the specs for contract bids? Will
they specify stainless steel rebar in roads
bridges?
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Materials selection - market
Carrera GT vs
Kia
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Materials selection - aesthetics
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Materials selection - properties
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Materials selection - properties
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Materials selection - properties
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Materials selection - properties
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Materials selection - properties