"... 12k, 23k and 13k are the corresponding strains; E1k and E2k are the Young's
modulus in the direction of the fibres (1-axis) and transverse to the fibres (2-axis),
respectively; G12k is the in-plane shear modulus, G23k and G13k are the
transverse shear modulus, 12k is the major Poisson's ratio, and 2 21 12 1 k k k k
E E. Thus, the stress-strain relationship with respect to x-axis and y-axis for the
kth (k1,2,", n) layer is 11 12 ..."