Coolfiber, kevlar och carbon..
- Thread starter Simon
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Jonne_boy
Äntligen tillbaka
Neox Spunk skrev:
kolfiber.. lättast
kevlar .. starkast
carbon .. fake?
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'Carbon' a.k.a. Kolfiber
What is Carbon Fibre?
Carbon fibre is made of one of life's base elements - carbon. Carbon fibres are fine filaments, made up of elemental carbon. Fibre types range from amorphous carbon to crystalline graphite.
The main features of carbon fibre as a material for design and manufacture are:-
1. Incredibly high tensile strength, approximately 15 times the strength of construction steel.
2. High rigidity, up to 3 times the stiffness of steel.
These two features mean that carbon fibre is a great material for making high performance products. It is also a great material for design. The high strength to weight ratio, in combination with high rigidity, offers superior design freedom.
This has led to carbon fibre being used in a diverse range of products, from yachting to high performance motor vehicles, to sporting goods.
Working with carbon fibre is a real challenge for the designer. The material is complex, with movable fibre orientation, and it's performance parameters are not yet well understood in the general design community.
As designers begin to understand carbon fibre, as material costs fall, and as more efficient process technologies are developed, carbon fibre will become a major material used to produce a wide variety of products.
What is Carbon Fibre?
Carbon fibre is made of one of life's base elements - carbon. Carbon fibres are fine filaments, made up of elemental carbon. Fibre types range from amorphous carbon to crystalline graphite.
The main features of carbon fibre as a material for design and manufacture are:-
1. Incredibly high tensile strength, approximately 15 times the strength of construction steel.
2. High rigidity, up to 3 times the stiffness of steel.
These two features mean that carbon fibre is a great material for making high performance products. It is also a great material for design. The high strength to weight ratio, in combination with high rigidity, offers superior design freedom.
This has led to carbon fibre being used in a diverse range of products, from yachting to high performance motor vehicles, to sporting goods.
Working with carbon fibre is a real challenge for the designer. The material is complex, with movable fibre orientation, and it's performance parameters are not yet well understood in the general design community.
As designers begin to understand carbon fibre, as material costs fall, and as more efficient process technologies are developed, carbon fibre will become a major material used to produce a wide variety of products.
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KEVLAR® is one of the most important manmade organic fibers ever developed. Because of its unique combination of properties, KEVLAR® is used today in a wide variety of industrial applications. KEVLAR® para-aramid fiber possesses a remarkable combination of properties that has led to its adoption in a variety of end-uses since its commercial introduction in the early 1970's.
Fibers of KEVLAR® consist of long molecular chains produced from poly-paraphenylene terephthalamide. The chains are highly oriented with strong interchain bonding which result in a unique combination of properties.
General Features of KEVLAR® :
High Tensile Strength at Low Weight
Low Elongation to Break High Modulus (Structural Rigidity)
Low Electrical Conductivity
High Chemical Resistance
Low Thermal Shrinkage
High Toughness (Work-To-Break)
Excellent Dimensional Stability
High Cut Resistance
Flame Resistant, Self-Extinguishing
Because of some of these features a kevlar weave is ideal for using as a wick for holding fuel.
Other uses of kevlar are
Ropes that secure the airbags in the crucial landing apparatus of the Mars Pathfinder
Small-diameter, lightweight ropes that hold 22,000 pounds and help moor the largest U.S. Navy vessels
Shrapnel-resistant shielding in jet aircraft engines that will protect passengers in case an explosion occurs
Run-flat tires that allow for greater safety because they won't ruin the rim when driving to the nearest assistance
Gloves that protect hands and fingers against cuts, slashes and other injuries that often occur in glass and sheet metal factories
Kayaks that provide better impact resistance with no extra weight
Strong, lightweight skis, helmets and racquets that help lessen fatigue and boost exhilaration
There are a number of variants of weaves for kevlar belts and kevlar wicks.
Kevlar/Steel/Cotton, Kevlar/Cotton and kevlar coated glass fiber threads are used in a number of different weave configurations to produce different characteristics depending on what the end product will be used for.
These configurations effect the wear, absorption(when used for wick) and strength of the end product.
As you have seen above there are many uses for Kevlar and you will notice that there are many different kevlar products being offered to fire performers by a number of well know and not so well known suppliers. This is good because you can choose the product that best fits your requirements and purse.
Fibers of KEVLAR® consist of long molecular chains produced from poly-paraphenylene terephthalamide. The chains are highly oriented with strong interchain bonding which result in a unique combination of properties.
General Features of KEVLAR® :
High Tensile Strength at Low Weight
Low Elongation to Break High Modulus (Structural Rigidity)
Low Electrical Conductivity
High Chemical Resistance
Low Thermal Shrinkage
High Toughness (Work-To-Break)
Excellent Dimensional Stability
High Cut Resistance
Flame Resistant, Self-Extinguishing
Because of some of these features a kevlar weave is ideal for using as a wick for holding fuel.
Other uses of kevlar are
Ropes that secure the airbags in the crucial landing apparatus of the Mars Pathfinder
Small-diameter, lightweight ropes that hold 22,000 pounds and help moor the largest U.S. Navy vessels
Shrapnel-resistant shielding in jet aircraft engines that will protect passengers in case an explosion occurs
Run-flat tires that allow for greater safety because they won't ruin the rim when driving to the nearest assistance
Gloves that protect hands and fingers against cuts, slashes and other injuries that often occur in glass and sheet metal factories
Kayaks that provide better impact resistance with no extra weight
Strong, lightweight skis, helmets and racquets that help lessen fatigue and boost exhilaration
There are a number of variants of weaves for kevlar belts and kevlar wicks.
Kevlar/Steel/Cotton, Kevlar/Cotton and kevlar coated glass fiber threads are used in a number of different weave configurations to produce different characteristics depending on what the end product will be used for.
These configurations effect the wear, absorption(when used for wick) and strength of the end product.
As you have seen above there are many uses for Kevlar and you will notice that there are many different kevlar products being offered to fire performers by a number of well know and not so well known suppliers. This is good because you can choose the product that best fits your requirements and purse.
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Slut. Frågor? Frammåt! (Som Freppa skulle sagt)
Ninja-Mackan
Norra Europas fattigaste kapitalist
Neox Spunk skrev:Jepp så är det säkert..
Men jag tror inte min lärare vill att jag ska ha med det i min uppsats..
Du borde ha med Grevens Duke II i din uppsats.
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Neox Spunk skrev:
Du har ingen aning om att det finns sökmotorer som typ http://www.google.com och liknande? Det tog mig 30 sekunder att hitta ovanstående info.
Eftersom KEVLAR är ett varumärke så kan du ploppa in på http://www.dupont.com/afs/ och kolla lite där annars så är det bara söka på nätet.
Goines skrev:Du har ingen aning om att det finns sökmotorer som typ http://www.google.com och liknande? Det tog mig 30 sekunder att hitta ovanstående info.
Eftersom KEVLAR är ett varumärke så kan du ploppa in på http://www.dupont.com/afs/ och kolla lite där annars så är det bara söka på nätet.
jojo, visst har jag sökt men jag får bara upp en massa skit..
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Testa 'What is carbin fibre' respektive 'What is kevlar' och du skall se på andra bullar.
/Goines - Proffesionell web-browsare.
/Goines - Proffesionell web-browsare.
Mr. Dante
MaChInE hEaD
Goines skrev:Testa 'What is carbin fibre' respektive 'What is kevlar' och du skall se på andra bullar.
/Goines - Proffesionell web-browsare.
Fanns inget på 'What is carbin fibre' ....
Karbin hake fands..
Martin
Guest
Kevlar brukar väl användas till en hel del andra saker ( tex bildäck, skyddsvästar, som skyddande väv i handskar mm), än kolfiber som väl för det mesta förekommer som armering ihop med plast. Då kevlar används för armering av plast, exempelvis som knogskydd på handskar, så brukar det kännetecknas av det gula "trådarna" som brukar ligga ett rutmönster över de svarta fibrerna. Är Kevlar helt enkelt inte vanligt kolfiber förstärkt med något syntetiskt material (det gula)?
Plåtniklas
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Mr. Dante skrev:Fanns inget på 'What is carbin fibre' ....
Karbin hake fands..
Ska du märka ord ska du göra det korrekt. Karbinhake heter det.
Martin skrev:
Så här ligger det till: kolfiber bstår av små små korta fibrer av kol (carbon) som det görs en matta/duk/väv av. Denna duk i sig själv är jätte hård (mtrl uppbyggnaden, inte mattan i sig själv). Sedan så lägger man på epoxy, som gör att det hela håller ihop och inte blir lika sprött. Dvs. kolfiber är en komposit som är extremt hård (dragtålig), men dålig på knäckning (då den är spröd).
Du har rätt att kevlar känns igen på sin gula väv, dock är den inte alltid gul. Kevlar har samma uppbyggnad som kolfiber (väv och epoxy) men uppför sig tvärtemot. Dvs. den har dålig draghållfasthet men extremt bra vid knäckning. Därför kan den användas till skyddsvästar mm. fast då utan epoxy.
Sen finns det ett extremt coolt mtrl som heter carbone carbone, men det pratade vi ju inte om här...
Mr.Dante: prova Carbone Fibre istället.
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Martin
Guest
Vad är carbone carbone?
Qvint
Ny medlem
Ojoj, nu kom det en bra diskusion, detta tycker gamla matrialingenjörn om *mys*
Kevlar är ju f.ö. ett varumärke. "Proffsen" säger aramidfiber istället, gör det så stödjer du inte Dupont Industrier, som äger namnet Kevlar !
Kol/kol är väl kolfiber i en kolmatris? om jag inte är helt ute och cyklar. Grymt hårt och starkt... och dyrt!
*mys*Kevlar är ju f.ö. ett varumärke. "Proffsen" säger aramidfiber istället, gör det så stödjer du inte Dupont Industrier, som äger namnet Kevlar !
Kol/kol är väl kolfiber i en kolmatris? om jag inte är helt ute och cyklar. Grymt hårt och starkt... och dyrt!
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