A Research On The Mesh Theory Of Digital Pattern Stitching Simulation And Its Realization Methods

Based on the MTM(Made to Measure) system, this paper studies the conversion technologies from 2D patterns to 3D garments, which can change the pattern-garment procedure from the traditional manual processing into automation form, and then realize the quick manufacturing of garments with small quantities but a lot of varieties.This paper consists of three modules including the theory, foundation and stitching models. Firstly, the theory module analyzes and discusses the advantages and disadvantages of different digital methods for garments simulation, trying to provide a useful reference for the researches and developments of a real-time digital simulation system. Secondly, the foundation module mainly talks about the cloth simulation model, establishing the rules for points numbering or naming, restrictions, stitchmg edge adjustment and so on. Finally, the stitching moduleintroduces integration methods, curve methods, space conversion methods, mesh region methods, construction and smoothing methods of curved surfaces, construction methods of 3D virtual garment and so on.Constructed on the actual stitching technology of garments, the paper tries to find a way to solve two critical techniques, that is, the definition of stitching elements and the establishment of the points numbering or naming rules for stitching lines. Based on physical-based models (the finite element model), patterns stitch on the digital mannequin in the sewing forces on key points and curves. As mesh partition of patterns is the primary part of 3D dynamic stitching simulation, it mainly researches three problems: partition region, connection between regions and 2D mesh algorithm of arbitrary topology regions. It presents a partition region method based on ANSYS system, and also defines four stitching concepts. This paper gives four different edge adjustment schemes for four stitching models based on a rectangular mesh.Combining two different 3D graphics softwares, AutoCAD and 3DS MAX, this paper simulates 3D virtual garments. As the paper finds out several problems during the digital simulation procedure, it finally concludes a new method for mesh region partition. It also presents a wayof second exploration for AutoCAD and 3DS MAX to simulate garment and provides the relative theories and technologies for it.