Modeling of Composite Laminated Plates with Interfacial Damage Evolution

A displacement field distribution model, which includes the effects of geometrical nonlinearity, high-order transverse shear deformation, and transverse normal deformation, is presented for composite laminated plates with interfacial damage evolution. Using the proposed model and variational principle, the nonlinear equilibrium differential equations are established. And these equations are solved by adopting the finite difference method and iteration method. Then, the analysis of interlaminar displacement distribution for cross-ply laminated plates with interfacial damage evolution under the action of transverse loads is presented. Numerical results show that the transverse normal deformation should not be neglected, and the deformation of the plate becomes larger and the displacements discontinuity occur at interfaces due to the interfacial damage. Also, the delamination phenomenon is obvious when the plate is excited by the transverse pulling loads, but the shear slip is dominant when excited by the transverse pushing loads.