Composites
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Transcript of Composites
A great teacher never strives to explain his vision. He simply invites you to stand beside him and see for yourself.
– R. Inman
A great teacher never strives to explain his vision. He simply invites you to stand beside him and see for yourself.
– R. Inman
CompositesComposites
Fibers - variablesamountfiber lengthdistributionorientation
Fibers - variablesamountfiber lengthdistributionorientation
CompositesComposites
Fibers - variablesamountfiber lengthdistributionorientation
Fibers - variablesamountfiber lengthdistributionorientation
Fiber orientation can berandom aligned intermediate
Fiber orientation can berandom aligned intermediate
Materials selection - some considerationsMaterials selection - some considerations
EconomicsEnvironmentalPoliticalMarketAestheticsMaterial properties
EconomicsEnvironmentalPoliticalMarketAestheticsMaterial properties
Materials selection - material costMaterials selection - material cost
Relative cost - compared to that of hot rolled ASTM A36 plate (0.29C-1Mn-0.28Si)
(unit wt. basis)
Relative cost - compared to that of hot rolled ASTM A36 plate (0.29C-1Mn-0.28Si)
(unit wt. basis)
Materials selection - environmentalMaterials selection - environmental
Health hazardsRecyclingHealth hazardsRecycling
Metals particularly suited to recycling - can be easily sorted, remelted, & shaped
Metals particularly suited to recycling - can be easily sorted, remelted, & shaped
Ceramics usually not recycled - many polymers are
Ceramics usually not recycled - many polymers areComposites difficult to recycle - difficult to separate fibers from matrix
Composites difficult to recycle - difficult to separate fibers from matrix
when drawing SS to rod
need lubricant
Materials selection - politicalMaterials selection - political
Who writes the specs for contract bids?
Will they specify stainless steel rebar in roads & bridges?
Who writes the specs for contract bids?
Will they specify stainless steel rebar in roads & bridges?
Materials selection - marketMaterials selection - market
Carrera GT vs ……Carrera GT vs ……KiaKia
vs ……vs ……
Materials selection - propertiesMaterials selection - properties
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
Materials selection - propertiesMaterials selection - properties
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
Materials selection - propertiesMaterials selection - properties
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
Assignment:
Review today's classnotes
a. fiber characteristics & behavior
b. selection considerationsc. use of Ashby charts
Read pp. 144-151
Assignment:
Review today's classnotes
a. fiber characteristics & behavior
b. selection considerationsc. use of Ashby charts
Read pp. 144-151
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
A great many people think they are thinking when they are merely rearranging their
prejudices. (William James)