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MECHANICS OF FIBER REINFORCEMENT COMPOSITES
Introduction:
We know metals have more strength and toughness but they are more
corrosive and weight is also more that is they are denser. While in case of
ceramics and polymer they are lighter in weight and anticorrosive but when we
want more toughness ceramics lack behind. Now a day for some application we
required a material which is light in weight having more strength and toughness
with anti corrosiveness property. Fiber reinforcement composite is best solution
of our requirement which is a material in which a homogeneous matrix
component is reinforced by a stronger and stiffer constituent that is usually
fibrous in shape. Compressive strength of matrix and tensile strength of fiber
makes it stronger. Fibers are strong due to removal of flaws in the case of
ceramics and molecular alignment foe polymer.
Fiber reinforcement composite mainly used where individual material
cannot meet specific requirement.
M1= material of matrix
M2= material of fiber
C1= fiber reinforcement composite
M1 + M2 = C1
(Light weight and anticorrosive) (High strength and tough) (Light weight, anticorrosive
High strength and tough)
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Function of fiber is to carry load along the longitudinal axis direction commonfiber reinforcement materials are
Aluminum, Asbestos, Carbon (graphite), Glass, Steel, Titanium,
Tungsten, Quartz, Polyamide (aromatic polyamide, Aramid )
example: kelvar49
Function of matrix is to transfer of stresses between the reinforcing the fibersand protect them from mechanical damages material for matrix are as follows
Resin matrix:
Epoxy, Phenolic, Polyester, Polyurethane, Vinyl ester
Metal matrix:
Aluminum, Copper, Lead, Magnesium, Silver
Matrix
Fibers
Fig. Fiber reinforcement composites
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APPLICATIONS:
fiber reinforcement composite have a wide range of applications like in
aerospace engineering, boat construction, in buildings, bridges etc.
Fiber reinforcement composites in industry
1. Automotive: Automotive industry adopted composites slowly as the cost offiber reinforcement composites is much higher. Generally fiber
reinforcement composites are used in sport car mostly carbon
reinforcement composites are used. Recently in BMWi3 and i8 car carbon
reinforcement composites are used.
2. For wind power turbine blade: because of some properties of fiberreinforcement composites like light weight, high strength and stiffness,
anti-vibration, anticorrosive and weather resistance it is used in making of
wind power turbine blade.
3. Marine: fiber reinforcement composites are used in boat structure. As glassfibers gives more uniform properties these are used in large structure. Use
of carbon fiber is more expensive as compare to the glass fibers.
4. Aerospace: Carbon reinforcement composites are now common in militaryand aviation. The Boeing 787 and airbus A350XWB have roughly 50% of
structure is of composite. Carbon fiber materials are also used in helicopter
system, rocket motors satellite system and turbine engine.
5. Miscellaneous applications: For making tennis rackets fiber reinforcement composites are used
as they provide light weight and stiffness.
These are also used in dental application. Used in furniture etc.
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