Life Cycle Assessment of Fiber Composites_final__rättad

joining two or more vertebrae, creating a bony union. The disk space may also
be replaced by medical implants called interbody fusion devices (IBFDs) such
as fusion cages, which holds the bone graft material within them. Recent study
show creation of composites which can be applied for spinal fusion different
types of material were tested along with polylactide 8 fiber reinforced
composites The goal of the study was to create a composite material, which is
much stronger in compression than cancellous 9 bone or vertebrae. This
material developed may also have use as a bone substitute or as a material for
bone fixation devices, such as plates, pins, screws, etc., in applications where
high strength is required. (Huttunen. et.al, 2006)
Recently fiber reinforced composite have made their way into dentistry. Their
mechanical properties can be tailor-made to correspond the properties of tooth
substance and bone, an increased interest has rose in their use in dentistry and
medicine. Multiphase mono- and dimethacrylate polymers are matrices for
composites made of inorganic and organic reinforcing fibers. These result in
enhanced adhesive bonding properties in cementing of appliances such as
dental bridges to tooth substance. (Vallittu et.al, 2001)
2.12.5. Fiber Composites in Sports goods
Another application of fiber composites is in sports goods. Nowadays wooden
racquets and fishing rods are almost history. Wood is rarely being used for
sports goods. In sports where the time and strength is what is required fiber
composites are playing a great role. When designing sport equipment most
important things to consider are strength, ductility 10 , density, fatigue resistance,
toughness and cost.
With introduction of new materials in sports new records have be set. Initially
bamboo stem was used for pole vaulting then came the aluminum and now
sophisticated fiber composites are being used. These have layers of different
fibers, which optimize the performance with an outer layer of high-strength
carbon fiber providing high stiffness and an intermediate webbing of fibers
together with an inner layer of wound-glass fiber building resistance to twisting.
The glass fiber consists of 80% longitudinal and 20% radial fibers. (Froes,
1997)
8 thermoplastic resin
9 where most of the veins and arteries are. Cancellous bone is the spongy interior layer of bone that protects
the bone marrow.
10 capable of being shaped
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