ANALYSIS OF NONLINEAR DYNAMIC RESPONSE FOR AXISYMMETRICAL DELAMINATED LAMINATED CYLINDRICAL SHELL UNDER CONSIDERING THE EFFECT OF CONTACT

Based the nonlinear elastic shell theory, the governing equations of motion for axisymmetrical laminated cylindrical shell with delamination were derived. The governing equation of transverse motion was modified by introducing pseudo spring to calculate the contact force to avoid the penetration between two delaminated layers. The problem was solved by finite difference method. In numerical examples, the effects of various sizes, depths, delamination positions and loads on the nonlinear dynamic response of the axisymmetrical delaminated laminated cylindrical shell were discussed in detail. Numerical results demonstrate the importance of considering the contact effect in the dynamic response analysis of the structures with delamination. It can prevent physically impossible interpenetration from emerging for delaminated structures.