Question

A unidirectional carbon fiber–epoxy lamina of 0.25 mm thickness is being used to produce different laminates. The elastic properties of the lamina are E11 = 162.8 GPa, E22 = 11.57 GPa, G12 = 4.31 GPa, and ν12 = 0.245. Compare the engineering elastic constants of the [±45/0]S and [±45/0/90]S laminates manufactured from this carbon fiber– epoxy material.

Answer 1