Abstract
Currently, generation of 3D woven T-joint models with complex weave geometries, using TexGen software, is a manual process. One of the main challenges to automatic generation of these textiles is the order in which the weft yarns interlace within the bifurcation region. This paper will demonstrate a method for predicting the order, based on the pattern draft and the information contained within it such as the direction of weft insertion and the beating action of the loom. The path of the entangling weft yarns and the yarn cross section orientation can then be modelled. Finally, a geometric transformation is applied to simulate the opening of the flanges so that the final model reflects the T-shaped profile.
Highlights
Composite T-joints are used in adhesive joints in applications such as bonding the spars to the wing skin and bulkheads together in aircraft fuselages and as structural components in wind turbine blades [1,2,3,4,5,6]
The aim of this paper is to provide and demonstrate a new design tool using TexGen that will quickly and accurately model the geometry of such weaves by reading of the pattern draft for automatic pre-processing before finite element analysis
If no weave pattern file is provided but the final positions of the weft yarns are known, these can be used to generate a weave pattern using the new WeftInsertion module to create the weft insertions based on the number of warp layers and stacks
Summary
Composite T-joints are used in adhesive joints in applications such as bonding the spars to the wing skin and bulkheads together in aircraft fuselages and as structural components in wind turbine blades [1,2,3,4,5,6]. TexGen is used because of its easy-to-use graphical user interface (GUI) and, being freely available open-source software, it is possible to modify the code as needed. WiseTex has a comprehensive GUI alongside XML input and output options alongside some possibilities for command line scripting, which while useful is less user friendly than TexGen’s Python scripting interface. This model will be a flat idealised geometry with intersections. The aim of this paper is to provide and demonstrate a new design tool using TexGen that will quickly and accurately model the geometry of such weaves by reading of the pattern draft for automatic pre-processing before finite element analysis (see Fig. 1)
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