Nonlinear dynamic response analysis of cylindrical composite stiffened laminates based on the weak form quadrature element method

This paper presents a weak form quadrature element formulation for the analysis of nonlinear dynamic response of cylindrical composite stiffened laminates subjected to impact loads. A total Lagrangian updating scheme in combination with Newmark's numerical integration is adopted to solve the nonlinear governing equations. The formulation of present shell and beam model stems from the basic concept of Ahmad (1970). Several numerical examples are firstly presented to verify the effectiveness and accuracy of the weak form quadrature element formulation. Parametric studies on the effects of the impact as well as geometric parameters, boundary conditions and lamination sequences of the laminates are performed. It shows that lamination sequences, geometric parameters, impact load type and duration have remarkable influence on the dynamic response of structures.