Study On The Methods Of Designing Crepe Weaves With Textures And Its CAD System Implementation

Crepe weave has a long history, and its warp and weft floating-point are both distributed by irregular manner, which made the fabric surface shows disordered lines. If the crepe tissue is coupled with some grain through a number of algorithm, the crepe effect will be more beautiful. On the other hand, the handle of the crepe weave is soft and thick, so it can be applied into the fabrics of cotton, wool, silk and chemical fiber. As the grain crepe weave has large loop, uniform weave point distribution and irregularity, artificial design is relatively complicated, makes mistakes easily and has some limitations. Therefore, the practical significance of the computer-aided designing is more outstanding. Although there are many CAD systems of textile designing in the current market, the relevant research report of the CAD designing of grain crepe weave is seldom, and there is no special CAD designing software for grain crepe weave. In short, the study of this paper is innovative and gives convenience for designing, development and production of grain crepe weave to some extent.In order to correspond to the computer automated designing, grain crepe weave looming draft should be changed into the digital presentation. In this paper a mathematical model of grain crepe weave looming draft was presented. And through analyzing the principle of crepe weave, and combining with matrix theory, the mathematical model were established for the principles of computer automated designing and at last the automated designing of the crepe weave were achieved. By analyzing three kinds of fractal algorithms of cellular automaton, iterated function system and LS algorithm for grammar composition, and combining with weave design algorithm, four automated designing models of grain weave e.g. bark, water, diamond and flower-shaped weave also were established and achieved, which had provided the original weave for the designing of grain crepe weave.On this basis, a mathematical method and a model of weaves compound were designed. This model can make two random weaves combined into one compound weave according to different proportion, and the calculation of the minimum numbers of warp, weft and harness of compound weave is primarily on the basis of the numbers of warp, weft and harness of the two original weaves. In this paper, a qualitative analysis of grain definition about different proportion of complex weaves were also made, which can make the foundation for quantitative analysis of definition of complex weaves.Finally, in the development environment of Visual Basic6.0, an automated design system of grain Crepe weave was developed. The system can generate crepe weave looming draft and grain weave looming draft automatically, compound the weaves by different proportion, simulate weaves and generate pattern grid. The system is a specific design system of grain crepe weave with perfect function and enriches the areas of the aided CAD designing of weave to some extent.In order to verify the feasibility of the system, the practicality of weaves designed by this system and the correctness of the mathematical models built in this paper, 21 samples were weaved on the sample loom, and were comparatively analyzed, which proved that the CAD designing system of grain crepe weave was feasible, weaves designed by this system were practical and the mathematical models established in this paper were correct.