Method of state decomposition and slice composition on rectangular delamination in composite cylindrical shell

Using the principle of superposition, the transverse loading state of a cylindrical shell with rectangular delaminations is decomposed, and the problem of delamination can be reduced to the analysis of an additional stress state of the original laminate subjected to the additional shear load along the delamination surface. The laminate sections parallel to the boundary of the delamination area can be regarded as laminated beams with delaminations, the displacements in which can be expressed by the analytical solutions of additional displacements in the above beams. By this way, the additional displacement fields satisfying the displacement boundary conditions of the delamination area can be established. Finally, a closed form solution of additional displacements is obtained by the principle of minimum potential energy.