Simulation model of 2-step three-dimensional braided fabrics

In order to provide a basic model for analysis of 2-step braid microstructure and related mechanics,the 2-step braided rectangular fabric was taken as an example,the place where the minimum distance between two crossing yarns in the fabric is explored with the help of math and diagram based on analysis of braiding operational rule and curvilinear motion of yarns.Then the determination of minimum pitch length is discussed on the understanding that yarns only keep touching but not interfering with each other in compacted state.A simulation model of braided fabrics is also presented on 3DS MAX platform in which braiding yarns appear straight inside the fabrics,bending at the surface with a circular cross-section.The model expresses fabric appearance and yarns interlacing clearly,and offers visualized information for design and optimization of braiding process.