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1

Geometrical Modeling of Woven Fabrics Weavability-Limit New Relationships

Dalal M., Drean J., Osselin J.

Autex Research Journal

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2017

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Vol. 17, no. 1

73--84

EN

The weavability limit and tightness for 2D and 3D woven fabrics is an important factor and depends on many geometric parameters. Based on a comprehensive review of the literature on textile fabric construction and property, and related research on fabric geometry, a study of the weavability limit and tightness relationships of 2D and 3D woven fabrics was undertaken. Experiments were conducted on a representative number of polyester and cotton woven fabrics which have been woven in our workshop, using three machines endowed with different insertion systems (rapier, projectiles and air jet). Afterwards, these woven fabrics have been analyzed in the laboratory to determine their physical and mechanical characteristics using air permeability-meter and KES-F KAWABATA Evaluation System for Fabrics. In this study, the current Booten’s weavability limit and tightness relationships based on Ashenhurst’s, Peirce’s, Love’s, Russell’s, Galuszynskl’s theory and maximum-weavability is reviewed and modified as new relationships to expand their use to general cases (2D and 3D woven fabrics, all fiber materiel, all yarns etc…). The theoretical relationships were examined and found to agree with experimental results. It was concluded that the weavability limit and tightness relationships are useful tools for weavers in predicting whether a proposed fabric construction was weavable and also in predicting and explaining their physical and mechanical properties.

2

Knitting Technologies And Tensile Properties Of A Novel Curved Flat-Knitted Three-Dimensional Spacer Fabrics

Li X., Jiang G., Nie X., Ma P., Gao Z.

Autex Research Journal

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2015

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Vol. 15, no. 3

191--197

EN

This paper introduces a knitting technique for making innovative curved three-dimensional (3D) spacer fabrics by the computer flat-knitting machine. During manufacturing, a number of reinforcement yarns made of aramid fibres are inserted into 3D spacer fabrics along the weft direction to enhance the fabric tensile properties. Curved, flat-knitted 3D spacer fabrics with different angles (in the warp direction) were also developed. Tensile tests were carried out in the weft and warp directions for the two spacer fabrics (with and without reinforcement yarns), and their stress–strain curves were compared. The results showed that the reinforcement yarns can reduce the fabric deformation and improve tensile stress and dimensional stability of 3D spacer fabrics. This research can help the further study of 3D spacer fabric when applied to composites.

3

Development Of 3D Woven Fabric Based Pressure Switch

Shaker K., Nawab Y., Javaid M. U., Umair M., Maqsood M.

Autex Research Journal

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2015

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Vol. 15, no. 2

148--152

EN

This paper introduces a 3D woven fabric-based approach for the development of pressure switch. A fabric substrate, being elastic and extendable is very useful in addition to its high breaking strength and low cost. The developed resistive-type switch is based on the multilayer interlock 3D fabrics. In the top and bottom layers, certain number of conductive yarns are woven separated by cotton yarns in both transversal and thickness direction. Application of pressure makes the layers of conductive yarn to come in contact, resulting in a short circuit, which may be recorded using multi-meters. Removing the pressure cause the connection points to separate away and it depends on the weave design. Such switch can be used as an on/off switch for usage in security systems, can be sewn into carpets and wearable garments for a number of purposes.

4

Investigation about the Manufacturing Technique of the Composite Corner Fitting Part

Wang P., Legrand X., Soulat D.

Autex Research Journal

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2014

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Vol. 14, no. 2

111--120

EN

Textile composite reinforcement forming has been employed in many aeronautic industries as a traditional composite manufacturing process. The double-curved shape manufacturing may be difficult and can lead to defects when the composite parts have high curvatures and large deformations. Compared with the textile composites forming, surface 3D weaving can demonstrate directly the geometry of final composite part without the stages involved in 2D product. The weaving in three directions is completely designed and warp and weft yarns are always perpendicular to the surfaces of the final 3D ply. These two manufacturing techniques are applied to produce an important piece of aircraft: the corner fitting. The 3D weaving results are compared with the experimental forming by a punch as same geometry as the corner fitting part. The conveniences and limits of each technique are investigated. The comparisons show particularly a perfect final 3D fabric with homogeneous fibre volume fraction performed by the surface 3D weaving technique.

5

New Method of Weaving Multiaxis Three Dimensional Flat Woven Fabric: Feasibility of Prototype Tube Carrier Weaving

Bilisik K.

Fibres & Textiles in Eastern Europe

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2009

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Vol. 17, no. 6 (77)

63--69

EN

A prototype of multiaxis three dimensional (3D) flat weaving was constructed, and the feasibility of this type of weaving was studied. Several multiaxis 3D woven and 3D orthogonal woven unit cells were developed and fabricated for the trial of the preforms. Multiaxis weaving units were described and implemented based on the initial trial period. The performance of each unit cell was tested, and important processing parameters were found to be related to the multiaxis unit cell. It was found that this kind of weaving could be achieved for certain types of unit cell, the results of which can be considered to be encouraging.

PL

Skonstruowano prototyp wieloosiowej 3D maszyny tkackiej oraz badano możliwość pracy tej maszyny. Opracowano szereg wieloosiowych 3D i 3D ortogonalnych członów maszyny dla próbnego wyprodukowania wstępnych wzorników. Wieloosiowe zespoły tkające zostały opisane i zrealizowane na podstawie wstępnego okresu badań. Sprawność działania każdego z zespołów została przebadana. Znaleziono ważne parametry procesu odnoszące się do poszczególnych zespołów maszyny. Stwierdzono, że tego rodzaju proces tkania można wykorzystać dla projektowania nowych jednostkowych typów zespołów a wyniki uzyskane można określić jako zachęcające.