A composite material composed of glass fiber and epoxy matrix (aligned and continuous) should restrain a stress of 1350 MPa. Matrix stress (o'm) is assumed to be 35 MPa when the fibers fail. The composite is cylindric and has a diameter of 1 cm. Glass fiber Carbon fiber Epoxy E-modulus [GPa] 72.5 230 2,41 a) Calculate the volume fraction of fibers and matrix? b) Calculate the load ratio between the fiber and matrix? c) Calculate the load carried by the fibers and matrix? Tensile strength [MPa] 3450 4200 70 d) If the glass fibers is substituted with carbon fibers. Calculate the tensile strength of the new composite material if the volume fraction is the same as calculated in question a. The matrix stress (o'm) is assumed to be 35 MPa when the fibers fail? Calculate the E-modulus and strain (e) for the two composite materials in question a and b and comment on the result? f) Explain the influence of fiber length and orientation on the E-modulus and tensile strength of fiber reinforced composites?