Question: 3. You are given a high modulus carbon fiber (Ef = 4100 GPa, vf = 0.18) and epoxy (Em 3.5 GPa, Vm = 0.4)
3. You are given a high modulus carbon fiber (Ef = 4100 GPa, vf = 0.18) and epoxy (Em 3.5 GPa, Vm = 0.4) to make into a unidirectional long fiber composite. Assume that the fibers and matrix are isotropic. Plot the Young's moduli E and E2 as a function of volume fraction (V = 0 1). You can use either the Halpin-Tsai or Reuss models for calculating E2, just identify which you used. (10 points) Plot the Poisson's ratios V2 and V21 as a function of volume fraction (V = 0 1). (10 points) What are the absolute maximum stiffness and Poisson's ratios this composite can have? Hint: think of fiber packing volume fractions. (10 points) a. b. C. =
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