to Kevlar (aramid) fiber reinforced polymers
to Properties of composites
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| Kevlar (aramid) Fiber Reinforced Polymer | ||||
| Composition: 50% Kevlar (aramid) unidirectional fibers in epoxy matrix | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 1.4 *10³ | kg/m³ | 87 | lb/ft³ |
|---|---|---|---|---|
| Tensile modulus (LW) | 76 | GPa | 11000 | ksi |
| Tensile modulus (CW) | 5.5 | GPa | 800 | ksi |
| Shear modulus | 2.3 | GPa | 330 | ksi |
| Tensile strength (LW) | 1400 | MPa | 203000 | psi |
| Tensile strength (CW) | 12 | MPa | 1700 | psi |
| Compressive strength (LW) | 235 | MPa | 34000 | psi |
| Compressive strength (CW) | 53 | MPa | 7700 | psi |
| Shear strength (LW) | 34 | MPa | 4900 | psi |
| Thermal expansion (20 ºC, LW)) | -4*10-6 | ºCˉ¹ | -2.2*10-6 | in/(in* ºF) |
| Thermal expansion (20 ºC, CW) | 80*10-6 | ºCˉ¹ | 44*10-6 | in/(in* ºF) |
LW- Lengthwise direction, CW- Crosswise direction