Role of fibre, yarn and fabric parameters on bending and shear behaviour of plain woven fabrics (original) (raw)
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Shear deformation analysis for woven fabrics
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A new mechanical model is proposed in this paper to evaluate the shearing properties for woven fabrics during the initial slip region. Compared to the existing mechanical model for fabric shear, this model involves not only bending but also torsion of curved yarns. This model has the advantage of taking into consideration the yarn undulation in fabrics while keeping mathematical rigor. Moreover, an erroneous formula in the previous research work from a referenced paper is modified. Analytical results show that this model provides better agreement with the experiments for both the initial shear modulus and slipping angle than the existing model. The approach for this model can be extended to predict other mechanical properties of fabrics in order to obtain more precise results.
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The paper analyses the tensile behaviour of woven fabrics made from 45%Wool + 55%PES used for garments. Analysis of fabric behaviour during wearing has shown that these are submitted to simple and repeated uniaxial or biaxial tensile strains. The level of these strains is often within the elastic limit, rarely going over yielding. Therefore the designer must be able to evaluate the mechanical behaviour of such fabrics in order to control the fabric behaviour in the garment. This evaluation is carried out based on the tensile testing, using certain indexes specific to the stress-strain curve. The paper considers an experimental matrix based on woven fabrics of different yarn counts, different or equal yarn count for warp and weft systems and different structures. The fabrics were tested using a testing machine and the results were then compared in order to determine the fabrics' tensile behaviour and the factors of influence that affect it.From the point of view of tensile testin...