Determine value of elastic property by rule of mixtures

Question

Response to the following problem:

Consider the following material called carbon-epoxy with a fiber volume fraction of 70% and E= = 379 GPa, νf = 0.22, Em= 3.3 GPa, and ν= = 0.35.

Compute E₁, E₂, ν₁₂, and G₁₂ using both the rule of mixtures (ROM) .

Consider the results and comment on which values are lower or upper bounds to the real value of each elastic property and what seems to be the best model in each case.