RMVT-based meshless collocation and element-free Galerkin methods for the quasi-3D analysis of multilayered composite and FGM plates

A meshless collocation (MC) and an element-free Galerkin (EFG) method using the differential reproducing kernel (DRK) interpolation are developed for the quasi-three-dimensional (3D) analysis of simply supported multilayered composite and functionally graded material (FGM) plates The strong and weak formulations of this 3D static problem are derived on the basis of the Reissner mixed variational theorem (RMVT) where the strong formulation consists of the Euler-Lagrange equations of the problem and its associated boundary conditions, and the weak formulation represents a weighted-residual integral in which the differentiation is equally distributed among the primary field variables and their variations The early proposed DRK interpolation is used to construct the primary field variables where the Kronecker delta properties are satisfied and the essential boundary conditions can be readily applied exactly like the implementation in the finite element method The system equations of both the RMVT-based MC and EFG methods are obtained using these strong and weak formulations respectively in combination with the DRK interpolation In the illustrative examples it is shown that the solutions obtained from these methods are in excellent agreement with the available 3D solutions and their convergence rates are rapid (C) 2010 Elsevier Ltd All rights reserved