You will find that you get quite different volume fractions for the composite specimens loaded parallel and perpendicular to the fibres. This is because the model used to derive the equations is somewhat simpler than the real situation. The model does, however give reasonably accurate predictions for loading parallel to the fibres but is less accurate when the loading is perpendicular to the fibres. Accordingly, the volume fraction you will obtain for the sample loaded parallel to the fibres is the correct value. The value you will obtain for loading across the fibres is substantially higher than it should be. Equations that better predict the behaviour for loading across the fibres are available but these are substantially more complex. 2. Discuss the differences in Young's modulus, strength and fracture energy of the two samples (4)