Parametric Finite Element Modeling Of Three Dimensional Textile Composites Based On Ansys

Three-dimensional textile composites have been more and more widely used in aerospace and automobile structures. The types of internal reinforcement fibre bundle structures of textile composites can be numerous. Mechanical properties of textile composites depend largely on the internal reinforcement structures. Therefore, in-depth study of the geometric properties of the internal architecture of the textile composites has both theoretical and practical significance for the prediction of their mechanical properties.As the geometries of the reinforcement structures in the textile composites are very complex, numerical methods have been widely used to predict their mechanical properties. Domain Superposition Technique (DST), a modeling methodology for the modeling of composites, proposed by Jiang (International patent application no: WO/2008/122751) has shown to be a very effective and easy-to-implement way to model textile composites. When using DST to model textile composites, only the internal reinforcement structures need to be discretised using traditional finite elements, and the resin rich regions which are the materials filled the gap spaces within the reinforcement structures are not needed to be modeled explicitly. In contrast to traditional finite models, DST is much easier to establish.The major goal of this thesis is to systematically establish the internal reinforcement finite element models of major types of widely used textile composites for using DST analysis. The commercial finite element package ANSYS has been used throughout. Parametric internal reinforcement fiber bundle geometric models for several major types of 3D textile composites have been successfully established using the Parametric Design Language of ANSYS software. These models will be valuable for the fast analysis and optimization design of textile composites.