Nonlinear theory of dynamic stability for laminated composite cylindrical shells

Hamilton principle war used to derive the general governing equations of no nlinear dynamic stability far laminated cylindrical shell in which, factors of nonlinear large deflection, transverse shear and longitudinal inertia f orce were concluded. Equations were salved by variational method. Analysis reveals that under the action of dynamic load, laminated cylindrical shells will fall into a store of parametric resonance and enter into the dynamic unstable region that causes dynamic instability of shells. Laminated shells of three typical composites were computed : i.e. T300/5 208 graphite epoxy E-glass epoxy, and ARALL shells. Results show that all factors will induce important influence for dynamic stability of laminated shell. So, in resea rch of dynamic stability for laminated shells, to consider these factors is important.