47—cloth Stiffness and Hysteresis in Bending

Livesey, R. G.; Owen, J. D.

doi:10.1080/19447026408662430

Cited by 113 publications

(42 citation statements)

References 3 publications

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“…Errors in KES-FB results are caused mainly by sample alignment and mounting, requiring care to obtain repeatable results [17]. The development of KES-FB method can be dated back to the early 1930s [18] and since then there was a long history of designing an appropriate clamping system for assuring pure bending conditions and maintaining uniform curvature throughout the sample [15,[19][20][21][22][23][24]. This uses sophisticated apparatus, able to provide a complete description of fabric bending behaviour including bending rigidity and hysteresis as a function of curvature.…”

Section: Review Of Related Workmentioning

confidence: 99%

“…Furthermore, fibres/tows are subject to bending deformation during buckling, which may lead to wrinkling. At present the modelling and characterisation of the bending behaviour of viscous composites still remains unresolved, although some efforts primarily for dry textiles have been made [8][9][10][11][12][13][14]. Two measurement systems, Kawabata Evaluation System (KES) [15] and Fabric Assurance by Simple Testing (FAST) [16], have been used widely to characterise the low-stress bending behaviour for dry fabrics.…”

Section: Introductionmentioning

confidence: 99%

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Experimental measurement and predictive modelling of bending behaviour for viscous unidirectional composite materials

2009

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It is widely accepted that the key deformation mechanisms during forming of viscous textile composite (prepreg) sheets are in-plane shear and out-of-plane bending. This paper focuses on the bending deformation mechanism, including experimental characterisation and theoretical modelling of bending behaviour during viscous composite forming. Experimental measurements are obtained by means of a large-displacement buckling test at a variety of displacement rates and temperatures. Some important aspects, such as viscoelastic behaviour, are also investigated. A bending model based on elastic theory combined with uniaxial continuum theory for ideal fibrereinforced fluids for viscous shear deformation has been developed, using material parameters obtained from industrial manufacturers as input data, such as composite geometry, fibre properties, fibre volume fraction and matrix rheology. Model predictions demonstrate that the model can capture the main characteristics of material properties, such as rate dependence. This bending model can be used in formability analysis for viscous unidirectional composite materials, and might be applied in a finite element forming simulation to account for the bending stiffness.

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Section: Review Of Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental measurement and predictive modelling of bending behaviour for viscous unidirectional composite materials

2009

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“…Even more importantly, perhaps, the bending properties of yarns have a major role to play in determining the mechanical properties of thc resulting fabrics. Consequently, there have been several studies of yarn bending behaviour, among which those by Platt era/, [ll and by Livesey and Owen [2] may be mentioned. The latter introduced an instrument capable of producing a complete bending moment/curvature relation as the yarn is subjected to a complete bending cycle.…”

Section: Introductionmentioning

confidence: 99%

The Friction Couple in Yarn Bending

Leaf¹

1995

The Journal of The Textile Institute

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“…Abbott, Coplan, and Platt (1960) proposed that because of the pressures at the cross-over points, the yarn in the woven fabric is composed essentially of alternate rigid and flexible sections and it is assumed that the yarn lies in a straight line. Livesey and Owen (1964) proposed a mathematical formula to show the relationship between cloth flexural rigidity and single fibre flexural rigidity. They considered the yarn twist and crimp in the fabric to be a collection of independent noninteracting helices.…”

Section: Introductionmentioning

confidence: 99%