What is the in-pane shear modulus of the fiber G12f​. for a unidirectional carbon/epoxy composite with the in-plane shear modulus of G12​=7.6GPa. Assume ==8.5 and the matrix shear modulus and fiber volume ratio to be Gm​=1.31GPa, and Vf​=0.45, respectively (10) 2. Consider a composite material with E1​=E2​=E and V12​=V21​≅0 (woven composite), and determine following: a) The (Vxy​)max​ in terms of E and G12​ and b) The corresponding angle θ where the maximum in (a) occurs (2)