DYNAMIC ANALYSIS OF LAMINATED COMPOSITE PLATES SUBJECTED TO TRANSVERSE IMPACT USING A PARTIAL MIXED 3-D FINITE-ELEMENT

This study uses a partial mixed 3-D finite element in the impact dynamic analysis of laminated composite plates subjected to circularly distributed impact loading of a small, cylindrically shaped, blunt-ended projectile. The contact force between the rigid projectile and the laminated plate is modeled by the Hertzian contact law. To solve the finite element equations of motion in the impact dynamic analysis, the Newmark direct integration scheme is employed to discretize the time domain. At the beginning of each time step, since the contact force is still unknown, the Newton-Raphson method is applied to find the contact force during impact. Some impact examples appearing in the literature are tested again in this study to evaluate the accuracy of the present partial mixed 3-D element in the impact dynamic analysis of laminated composite plates.