A new geometrical nonlinear laminated theory for large deformation analysis

A six-variable geometrical nonlinear shear deformation laminated theory is presented in which normal stress and strain distribution can be calculated. By considering some a€ective factors that were neglected under the ®nite deformation condition, an improved Von Karman geometrical nonlinear deformation-strain relation is used for large deformation analysis. By analyzing the bending problem of laminated plates, and by comparing it with 3-D elasticity solutions and J.N. Reddy ®ve-variable simple higher-order shear deformation laminated theory, we can come to a conclusion that a satisfying precision of the calculation studied in this paper has been achieved, which shows that it is especially suitable for application of the calculation in the condition of a large deformation and the laminated thick plate analysis