The table below gives physical properties for three types of fibers used to reinforce polymer resins to make PMC materials.
FIBER TYPE>> CARBON ARAMID E-GLASS
Modulus of Elasticity- MSI 33 18 10.5
Tensile Strength- KSI 580 400 500
Specific Modulus of Elasticity- MSI 18.3 12.5 4.1
Specific Tensile Strength- KSI 322 278 197
Specific Gravity- g/cc 1.8 1.44 2.54
Relative Cost High Moderate Low
MSI = million lb/in2
KSI = thousand lb/in2
Compare these fibers as the reinforcing material in PMC materials. In what types of applications might you chose each of them, keeping in mind stiffness, strength, density and cost factors? A thorough discussion is expected.