Question

Two composite materials were suggested to be used for specific application under isostrain condition. The first composite material consists of 20% aramid fibers (modulus of elasticity:19×106 psi) and 80% polycarbonate matrix (modulus of elasticity: 3.5×105 psi). The second composite material consists of unidirectional carbon-fiber reinforced –plastic. 20% fiber (modulus of elasticity: 55×106 psi) and 80% matrix (modulus of elasticity: 0.5×106 psi).

a) If the application requires modulus of elasticity to be not less than 11×106 psi. Which composite material do you pick?

Answer 1