(3) Consider using vacuum bagging technique to make a carbon/epoxy composite. The thickness of the assembly is 1.2 mm. Assuming that the pressure applied in the autoclave is 547 kPa. Determine: (12) a). Effective stress absorbed by the fiber network. b). Pressure in the resin. c). Speed of flow of the resin out of the fiber network when viscosity =1 Pa-s. (hint: using Kozeny-Carman to estimate the permeability of fiber reinforcement and then the 1-D Darcy's law) The fiber volume fractions are: Initial fiber volume fraction V.=0.50 Allowable fiber volume fraction: V.=0.85 Final volume fraction V;=0.68. Fiber modulus: E = 234 GPa Fiber aspect ratio: B = 300 Fiber radius r=3.5x10m Kozeny-Carmen constant ko=18