AN ANALYTICAL STUDY ON IMPACT BEHAVIOR OF AXISYMMETRICAL COMPOSITE PLATES

Impact responses of transversely isotropic circular plates are investi gated analytically. A modified Hertzian contact law is incorporated in the analysis to express the interaction between a spherical head impa ctor and transversely isotropic plates. Transverse shear and geometric nonlinearity are considered. A nondimensional equation of vibration i s derived, based on the Lagrange equation of motion. First, the effect s of various parameters on the impact behavior are assessed through th e nondimensionalized equation. Then, the equation is developed by a fi nite element technique and solved numerically by the use of Newmark's time integral algorithm. The effect of the mass of the impactor on the global impact response is studied. The results are also compared with static results in order to estimate the significance of dynamic effec ts.