Viscoestic failure analysis of composite plates and shells

摘要

The present paper describes a numerical method for modeling the failure behavior of composite laminates in the presence of large displacements and creep. Geometrical nonlinear finite elements are sue for the discretization. The modeling of material behavior includes thermal, hygroscope and viscoelastic effects, using an efficient state variable representation. Incremental damage is determined and used to calculated a modified stiffness matrix. Thus, the procedure can be used to analyze, for example, buckling, creep buckling and creep buckling including damage. A detailed formulation, computational procedures and examples to check the accuracy of the code are presented.