Four-noded finite element post-process method using a displacement field of higher-order laminated composite plate theory

A postprocess method is developed in the framework of a four-noded isoparametric Mindlin element for laminated composite plates. This method utilizes only the solutions of the first-order shear deformation theory. Thus, the solution routine is very simple and efficient. To obtain improved stresses and deformations, a displacement field of a higher order plate theory is used in a postprocess routine. By matching transverse shear strain energy, the rotational variables of first-order theory can be expressed as those of a higher order theory. By solving a two-dimensional square plate problem in simply-supported boundary conditions, it can be shown that the present method works well in the finite element framework. The present postprocess method should serve as an efficient and accurate tool to predict the improved stresses and deformations of laminated plates in the finite element method. Copyright (C) 1996 Elsevier Science Ltd