Six-variable geometrical nonlinear laminated theory for large deformation

A six-variable geometrical nonlinear shear deformation laminated theory is presented by which normal stress and strain distribution can be calculated. By considering some affective factors that were neglected under the finite deformation condition, an improved von Karman geometrical nonlinear deformation-strain relation is used for large deformation analysis. After analyzing the bending problem of laminated plates, and comparing it with 3-D elasticity solutions and J. N. Reddy five-variable simple higher-order shear deformation laminated theory, we can conclude that a satisfactory calculation precision has been achieved, which shows that it is especially suitable for the calculation in the condition of large deformation and the laminated thick plate analysis.