Abstract: he state equations and semi-analyical solutions for thick composite double curved shells are presented.By the separation of variables,the finite element method is employed in the α-βlamina,and the exact solution in the thickness(r)direction is derived by the state space control method,so the transverse shear effect is considered.By using the transfer matrix meth-od,the continuity of the displacements and stresses at the two interfaees is maintained,and the number of variables is reduced greatlly.

Key words: composite structures, shells (structural forms), equations of state, semiempir-ical equations