Calculate the density of a composite made with 35% Kevlar-49 fibers in an epoxy resin (ρ = 1.1 kg/m3, E = 2.5 GPa). For Kevlar-49, Ef = 131 GPa; density = 1440 kg/m3

Explain the relationship between STRUCTURE/ PROPERTIES/ PROCESSING/ PERFORMANCE of a polymer which is a drawn fiber thermoplastic. You should have at least a sentence for each of these.

An epoxy (E=2.7GPA) is reinforced with carbon fiber with module of elasticity equal to 260 GPa. Design a composite with a longitudinal elastic modulus of 160 GPa. Select one: a. Vm = 70 vol%, Vf = 30 vol% b. Vm = 40 vol%, Vf = 50 vol% C. Vm = 39 vol%, Vf = 61 vol% d. Vm = 62 vol%, Vf = 38 vol%

An epoxy (E = 3.25 GPa) is reinforced with 55 vol% E-glass (E = 79 GPa). The fibres are continuous and aligned. Assuming no voids, compute the modulus of elasticity in the longitudinal and transverse (lateral) directions. Select one: a. Longitudinal modulus = 25.1 GPa, Transverse (lateral) modulus = 44.9 GPa b. Longitudinal modulus = 44.9 GPa, Transverse (lateral) modulus = 6.9 GPa c. Longitudinal modulus = 6.9 GPa, Transverse (lateral) modulus = 74.2 GPa d. Longitudinal modulus = 74.2 GPa, Transverse (lateral) modulus = 25.1 GPa

A composite material that has boron fibers coated in aluminum has a density of 2.65 g/cm^3. The fibers have a Young's modulus of 380 GPa, and aluminum has a Young's modulus of 70 GPa. The density of the fibers is 2.36 g/cm^3 and the density of the aluminum is 2.70 g/cm^3. What is the volume of the matrix? Answer:

Please answer in proper units

There are 4 classifications of structural molecular characteristics of polymers - Linear, Network, Crosslinked. What is the final type? Answer:

Need correctly.