4. Plot curves of E2/Em versus Vf for a unidirectional

4. Plot curves of E2/Em versus Vf for a unidirectional carbon/epoxy material with the constituent properties: E2f = 14.8 GPa Em = 3.45 GPa Vm = 0.6 using a. Mechanics of Materials model b. Halpin-Tsai model with ?=1 Locate information about several measured values of E2/Em from the internet or journal articles and add them to the plot. Document your sources. 5. Problem 3.12 6. The in-plane shear modulus of a unidirectional carbon/epoxy composite was measured to be G12 = 6.9 GPa. Using the Halpin-Tsai relation and the fact that ? = 10 Gm = 1.27 GPa and Vf = 0.6 determine G12f.
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