The nonlinear equilibrium equations of the plates having large deflections are solved by employing augmented Lagrange multiplier method. The rotational degrees of the freedom are represented by the unit vectors on the nodal points, and the equilibrium...
The nonlinear equilibrium equations of the plates having large deflections are solved by employing augmented Lagrange multiplier method. The rotational degrees of the freedom are represented by the unit vectors on the nodal points, and the equilibrium equations are formulated by using small deflection theories of the plated elements. The global translational equilibrium equations become simple linear equation. and the rotational degrees of freedom are computed by monotonically reducing the moment constraint errors toward zero. Thus the complicated Newton Raphson method is not required to solve the global equations. The special attention is paid to solve the plates of the composite materials, and the accuracy and the solution efficiency are compared with those of ABAQUS.