关键词: 自适应网格划分, 纱线模型, 弹簧质点模型, 针织物仿真

Abstract: In order to improve the efficiency of knitted fabric simulation and ensure the authenticityof the simulation effect, a method of using the periodicity of yarn model is proposed. The method first establishes the correspondence between the mesh and the yarn model, and then simulates the mesh model and the yarn model separately. To speed up the mesh simulation and improve the deformation effect under low resolution mesh, the adaptive remeshing technique is used to appropriately subdivide and coarsen the mesh model at the corresponding location according to the degree of deformation, and to calculate the strain on the mesh surface. In terms of microscopic deformation details, the minimum repetitive cell of the yarn is simulated using different strain parameters as input, and the relationship between the input strain parameters and the energy density of the repetitive cell is obtained. Finally, the simulation results are mapped onto the mesh model that has been output by the mesh simulation through the input of the strain parameters obtained in the mesh model. A simulation experiment is taken in fabrics of five different knitting methods. The results show that this method is closer to the real deformation effect than the traditional mesh simulation method, and the number of model vertices and meshes used in the simulation process is reduced by 20%-30% compared with the input mesh, and the time efficiency can be improved by up to 39.7%.

Key words: adaptive remeshing, yarn model, mass-spring system, knitted cloth simulation