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Fibre-reinforced Polymer Composites

Mechanical properties of fibers used to reinforce polymer composites.

Mechanical properties of some common fibers used to reinforce polymer composites:

Fibre-reinforced Polymer Composites - Mechanical Properties
FiberTensile StrengthTensile Modulus
(Young's Modulus)
(MPa)(103 psi)(GPa)(106 psi)(kg/m3)(lb/in3)
E-Glass 3500 510 72.5 10.5 4.9 2630 0.095
S-Glass 4600 670 88 12.8 5.5 2490 0.09
AS-4 PAN-Based Carbon 4000 578 245 35.5 1.6 1800 0.065
IM-7 PAN-Based Carbon 4900 710 317 46 1.7 1744 0.063
P120 Pitch-Based Graphite 2250 325 827 120 0.27 2187 0.079
Alumina/Silica 1950 280 297 43   3280 0.12
Kevlar 29 2860 410 64 9.3   1440 0.052
Kevlar 49 3650 530 124 18 2.5 1440 0.052
Boron 3620 525 400 58 1 2574 0.093
  • E-glass - A low alkali borosilicate glass with good electrical and mechanical properties and good chemical resistance. The most widely used in fibers for reinforcing plastics.
  • S-Glass is a stiffer/stronger version of E-glass which is also used in polymer matrix composites. S-Glass is generally used for polymer matrix composites that require improved mechanical properties compared to E-glass based composites.
  • PAN-Based Carbon fibers are made of polyacrylonitrile (PAN). Carbon fibers are high-strength and high-
    stiffness materials used in advanced constructions like military aircrafts etc.
  • Alumina/Silica or trademark Saffil is produced as a fiber and was developed for thermal insulation at higher temperatures.
  • Kevlar 29 is used in industrial applications such as cables, asbestos replacement, brake linings, and body armor.
  • Kevlar 49 is considered to have the greatest tensile strength of all the aramids, and is used in applications such as plastic reinforcement for boat hulls, airplanes, and bikes.

Related Topics

  • Material Properties

    Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.
  • Mechanics

    The relationships between forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.
  • Statics

    Forces acting on bodies at rest under equilibrium conditions - loads, forces and torque, beams and columns.

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