GEOMETRICALLY NONLINEAR TRANSIENT DYNAMIC-RESPONSE OF LAMINATED COMPOSITE STIFFENED SHELLS

The paper uses the conventional 9-noded Lagrangian element for studying geometrically non-linear elastic transient response analysis of composite stiffened shell. An improved version of the stiffener modelling has been used in which a stiffener can be placed anywhere inside the element. For the first time in the literature, concentric or eccentric stiffeners has been used for composite stiffened shells for solving the problem of the paper which is not available in any existing commercial packages. Large deflection transient response analysis of composite stiffened shells has also been presented for the first time. The results of stiffened composite cylindrical shells and doubly curved shells with different boundary conditions and various laminae orientations have been presented for eccentric stiffeners. Parametric studies considering different variables have also been carried out.