| 1. |
- Eriksson, Siw, et al.
(author)
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Three-dimensional multilayer fabric structures for interactive textiles
- 2011
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In: 3rd World Conference on 3D Fabrics and Their Applications; Wuhan; China; 20 April 2011 through 21 April 2011. - 9781846260490 ; , s. 63-67
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Conference paper (peer-reviewed)abstract
- Abstract. The integration of performances in interactive textile fabric system has so far been rather complicated since they are based on multilayer or three-dimensional principles. These structures are today mainly put together by means of several processes, which is laborious and time consuming. In this interdisciplinary study we have combined the principle of a three-dimensional multilayer weaving process and interactive textiles structures in order to enable the manufacturing of interactive textile structure in one process. The process is investigated using a manual reconstructed loom and the approach has been to use the 3D structures in order to integrate and organize conductive and compressive spacer layers as a textile capacitive structure. Measurements on such a structure was done by construction a first order passive high pass filter and using the fabric sample as the capacitor and a 1MΩ resistor. The behavior of the measurement of the capacitive sensor is quite close to the theoretical calculation and already at this stage the structure might be used to indicate the presence of a pressure. In this project we have shown that a three-dimensional structure enables the development of interactive textiles in one process. Further the concept of using a rebuilt manual loom has shown great potential in early research stages. It is considerable saving time and resources since, in this case, it is easy to reconstruct the loom design compared to performing similar reconstruction on a machine. Future research will focus on developing other types of interactive structures. Another issue will be to scale down the size of the structures in order to get thinner and more flexible qualities.
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| 2. |
- Stig, Fredrik, et al.
(author)
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Modelling of Composites containing 3D-woven Reinforcement
- 2011
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In: Proceedings of the 3rd World Conference on 3D Fabrics and Their Applications. - : WORLD ACAD UNION-WORLD ACAD PRESS. - 9781846260490 ; , s. 142-147
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Conference paper (peer-reviewed)abstract
- 3D weaving is an emerging textile technology that is now receiving great interest, particularly from the aerospace industry, for its potential utilisation in structural composites. The challenge and the driver for this work, is to generate numerical models to predict the mechanical behaviour of these composites. Presently, there seem to be no modelling software or framework able to generate such models with a sufficient level of detail, i.e. providing reliable predictions of mechanical properties and overall behaviour. The proposed modelling framework is based on a number of Python scripts that primarily perform three types of operations. They generate information such as yarn orientations, principal architecture and local fibre volume fractions, they locate and organise node pairs used for applying boundary conditions etc., and finally, they transfer information between different (other) software packages. The result of the final modelling stage is an FE model of the composite's representative volume element (RVE). It is created by using only a small number of input parameters, such as the size of the RVE, the number of yarns and their mutual interlacing, and the yarn crimp. The FE-model may then be utilised for various purposes, but is here used to calculate the homogenised elastic mechanical properties. The correlation between the model and the experiments is very good, both in terms of details in the architecture and mechanical properties. There are however some deviations that could be explained by the model being more regular than the real material.
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