1. We want to produce 10 lbs. of a continuous unidirectional fiber-reinforced composite of HS carbon in a polyimide matrix that has a modulus of elasticity of at least 25 × 106 psi parallel to the fibers. How many pounds of fibers are required?
2. We produce a continuous unidirectionally reinforced composite containing 60 vol% HM carbon fibers in an epoxy matrix. The epoxy has a tensile strength of 15,000 psi. What fraction of the applied force is carried by the fibers?