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Reinforcement

Reinforcement

reinforcement


Forms of reinforcement

Material Info
Filament The fiber that the average diameter is 5-10Microns.
Strand The basic bundle of continuous fibers that are not twisted.
Yarn Yarn is a long continuous length of twisted filament suitable for use in the production of weaving.
Tow Tow is an untwisted bundle of continuous filaments.
Roving A roving is a long and narrow bundle of fiber. Rovings are produced during the process of making spun yarn from wool fleece, raw cotton, or other fibres. Their main use is as fibre prepared for spinning, but they may also be used for specialised kinds of knitting or other textile arts. After carding, the fibres lie roughly parallel in smooth bundles.
These are drawn out, by hand or machine, and slightly twisted to form lengths suitable for spinning. These unspun strands of fibre are the rovings.

Metal vs. Fiber reinforcement

Category Material Tensile
Strength
(MPa)
Stiffness
(GPa)
Density
(g/cm2)
Tensile
(Strength/Density)
(X103)
Fiber
Reinforcement
Glass fiber 3450 ~ 4300 73 ~ 87 2.5 1.4 ~ 1.8
Carbon fiber 1900 ~ 5600 230 ~ 760 1.8 ~ 2.1 1.1 ~ 1.3
Aramid(Kevlar) fiber 3450 ~ 3620 130 ~ 180 1.46 2.3
Boron fiber 3450 400 2.5 1.4
SiC fiber 3440 400 3.5 1.1
Al203 fiber 1400 380 3.95 0.4
Metal Al 260 ~ 410 69 ~ 73 2.71 0.1 ~ 0.15
Steel 450 ~ 830 207 7.87 0.06 ~ 0.1