An equivalent formula of 3D elastic constants of composite laminates was presented herein according to three-dimensional macroscopic elastic properties of the laminated structure and the three-dimensional laminated structure theory. A modular program was also established on a MATLAB platform, this theory was applied in the equivalent of the plane ply and ring ply part of a large rotating mechanism. Inputting the elastic parameters of each single layer structure, the stiffness matrix, flexibility matrix and equivalent elastic constants can be au...
