ANALYTICAL METHOD OF SOLUTION ON ASYMMETRIC DELAMINATION IN SYMMETRIC ORTHOGONAL COMPOSITE LAMINATED BEAMS

Using the principle of superposition, the transverse loading state of a laminated beam with a delamination is divided into symmetric and antisymmetric states. The problem of the delamination can be reduced to the analysis about the additional displacements and stresses which are caused by the additional shear loading. Then a simple mechanical model about the delamination is established. Finally, the analytical solutions of displacement and stress are established by the theory of engineering beam. Using the energy release rate method, one can get the stress intensity factor of the delamination.