Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 68, Issue 7-8, Pages 1671-1678Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2008.02.018
Keywords
textile composites; fabrics/textiles; finite element analysis (FEA); modelling; fabric geometry
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Textile fabric geometry determines textile composite properties. Textile process mechanics determines fabric geometry. In previous papers, the authors proposed a digital element model to generate textile composite geometry by simulating the textile process. The greatest difficulty encountered with its employment in engineering practice is efficiency. A full scale fiber-based digital element analysis would consume huge computational resources. Two advances are developed in this paper to overcome the problem of efficiency. An improved contact-element formulation is developed first. The new formulation improves accuracy. As such, it permits a coarse digital element mesh. Then, a static relaxation algorithm to determine fabric micro-geometry is established to replace step-by-step textile process simulation. Employing the modified contact element formulation in the static relaxation approach, the required computer resource is only 1-2% of the resource required by the original process. Two critical issues with regards to the digital element mesh are also examined: yarn discretization and initial yarn cross-section shape. Fabric geometries derived from digital element analysis are compared to experimental results. (c) 2008 Elsevier Ltd. All rights reserved.
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