Profiled Component Three-dimensional Textile Preforms Simulation System Design And Implementation

As an advanced material, three-Dimensional braided composites possess many superior performances: high strength, rigidity, impact resistance, high temperature tolerance and erosion tolerance. To data, among the fabrication methods of three-dimensional braid, four-step braiding is the most generally used. As a result of the complex technique, the braiding procedure is usually difficult to describe and the fabric structure is intricate.In this thesis, starting with rectangular braiding mechanism and process, the movement traces of yarn carrier on the braiding machine bed was and a control volume method was employed to model microstructure of three-Dimensional braided performs produced by the four-step rectangular braiding process and divided into three regions i.e. interior, surface and corner. And the tubular braiding mechanism and process of mechanism and. The relations between the braiding parameters of the preform were derived.Based on the analysis of the 3-d braiding mechanism and the microstructure a simulation system was developed for 3-D braiding using computer graphics, Visual C++.net and OpenGL. The system can simulate the design of arranging yarns in the machine bed, the movement of the machine bed and the process of the preform. Theparameters of the preform in the braiding process can also be received.This System help to the design of 3-D braiding and the process can be displayed in acomputer, which enhances the precision and speed of process design and contributes greatly to the design quality of 3D braided composites. This paper also offers a new way for braided -fabric structure simulation in three dimensions before braiding.