Abstract:

In order to develop an available model for simulative analysis of mechanical properties of 3D woven orthogonal structure composites, the micro-geometry structure of the preform of three-layer orthogonal woven composite was observed and the geometric positional relationship between the yarns in the least repeating unit of the three-layer orthogonal woven composite was analyzed. Then the relationship between the geometrical parameters of the least repeating unit and the designing parameters was discussed. On this basis, parametric design of the preform of composite material was carried out by using Pro/Engineer software, and a common model of the 3D orthogonal structural preform was established. And then, the rationality of the model was verified by comparing the actual structure, model structure, and the fiber volume fraction.