IMPACT RESISTANCE MODELING OF HYBRID LAMINATED COMPOSITES

This paper discusses the analytical and numerical results for the impa ct responses of two types of plates with equal areal weights: hybrid l aminated composite plates and homogeneous metallic plates. The loading s and the boundary conditions for the two types of plates are the same , and an impact load was applied at the center of each plate. An analy tical solution based on Fourier expansion was developed to obtain the impact responses of the plates. The finite element method (FEM) was us ed to perform numerical analyses to verify the analytical solutions. T he response patterns from the results were compared and a preliminary conclusion made on the impact resistance ratio between the hybrid lami nates with proper interfacial bonding and that of equivalent homogeneo us metallic plates. The effect of different shapes of pulse on the lam inated composites was also examined. Three loading cases were consider ed, each being a function of time. The effect of different pulse shape s on the impact response was evaluated. Finally a solution based on sh ear deformation theory was developed, and the comparison between class ical plate theory results and shear deformation theory results indicat es that for the problem examined classical plate theory predicts relat ively accurate results.