Direct stress–strain representation for coated woven fabrics

Bridgens, Ben; Gosling, Peter

doi:10.1016/j.compstruc.2003.07.005

Cited by 82 publications

(55 citation statements)

References 14 publications

(21 reference statements)

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“…We can take the sum of the squares of difference in the values between the left-hand side and the right-hand side of equation (1) In order to derive five equations for the determination of five unknown elastic constants that are minimizing the sum, we partially differentiate equation (2) and equate the results to be zero as following. (3), we can determine five elastic constants relating each of the quadrilaterals or triangles shown in Fig.…”

Section: Ty Exy Eyy εY Eymentioning

confidence: 99%

See 1 more Smart Citation

A Multi-Step Linear Approximation Method for Nonlinear Analysis of Stress and Deformation of Coated Plain-Weave Fabric

Minami

2006

J. Text. Eng.

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The elastic constants are approximately determined using a multi-step linear approximation method for more accurate material nonlinear analysis of coated fabric membrane structures. The approximate determination is performed within each quadrilateral or triangular surface defined on the surfaces of the biaxial elongation property formed with the data of stress-strain curves measured by biaxial extension testings. Two types of 40 × 40 cm square flat membrane model of a PTFE coated plain-weave glass fiber fabric are analyzed applying finite element method adapting a 20-steps linear approximation method. One of the models is an inplane deformation model subjected to biaxial extension under the condition of stress ratio of 1:1. The stress-strain response in the central region of the membrane is analyzed. And the other model is a membrane deformed by the application of air pressure. The relation between the central deflection and the pressure is analyzed. The results of analysis showed excellent coincidences with experimental results.

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Section: Ty Exy Eyy εY Eymentioning

confidence: 99%

“…Bridgens et al [2] presented a method using spline functions to define the biaxial stress-strain response surfaces whose shapes express the sudden changes in gradient. And they presented a procedure for the determination of elastic constants for the use of linear constitutive equations at arbitrary position on the response surfaces.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Step Linear Approximation Method for Nonlinear Analysis of Stress and Deformation of Coated Plain-Weave Fabric

Minami

2006

J. Text. Eng.

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“…Both PTFE-and PVCcoated-fabrics are employed today in different types of tents and architectural membrane structures all over the world [13]. As the fabric is prepared from high crystalline polymer (spun fiber), it can resist environmental loads, as tensile stresses in the plane of the fabric [12]. These fabrics are popular mainly due to their affordable prices, high strength, durability, resistance to wear and tear, various colors, and soft texture [11].…”

Section: Introductionmentioning

confidence: 99%

“…The physical properties of a coated-fabric depend on the specific properties of the substrate, coating formulation, coating technique, and processing conditions during coating [10]. There are two principal types of coated woven fabric: glass fiber fabric with a PTFE (polytetrafluoroethylene) coating and polyester fabric with PVC (Polyvinyl chloride) coating [12]. Both PTFE-and PVCcoated-fabrics are employed today in different types of tents and architectural membrane structures all over the world [13].…”

Section: Introductionmentioning

confidence: 99%

New Solvent for Polyamide 66 and its use for Preparing Single-Polymer Composite Coated-Fabric

Jabbari¹,

Ranjbar²,

Skrifvars³

et al. 2018

Preprint

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Polyamides (PAs) are one of the most important engineering polymers; however, the difficulty in dissolving them hinders their applications. Formic acid (FA) is the most common solvent for PAs, but it has industrial limitations. In this contribution, we proposed a new solvent system for PAs by replacing a portion of the FA with urea and calcium chloride (FAUCa). Urea imparts the hydrogen bonding and calcium ion from the calcium chloride, as a Lewis acid was added to the system to compensate for the pH decrease due to the addition of urea. The results showed that the proposed solvent (FAUCa) could readily dissolve PAs, resulting in less decrease in the mechanical properties during the dissolution. The composite prepared using the FAUCa has almost the same properties like the one prepared using the FA solution. The solution was applied on a polyamide 66 fabric to make an all-polyamide composite coated-fabric, which then was characterized. The FAUCa solution had a higher viscosity than the one prepared using the neat FA solvent, which can be an advantage in the applications which needs higher viscosity like preparing the all-polyamide composite coated-fabric. A more viscouse solution makes a 2 denser coating which will increase the water-/gas-tightness. In conclusion, using the FAUCa solvent has two merits: 1. replacement of 40 % of the FA with less harmful and environmentally-friendly chemicals and 2. enabling for the preparation of more viscouse solutions, which makes denser coating.

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“…Extended reviews of inflated membrane applications were made by Bulson (1973), Herzog (1976) and Bernasconi and Reibaldi (1986), whereas fabrication and construction details were described by Sobek and Speth (1995). In the area of membrane fabric material, Karwath et al (2007) applied orthotropic material constitutive equations and conducted tension experiments in order to extract in-plane stiffness parameters of woven membrane materials under variable ratios of in-plane loading, whereas Bridgens and Gosling (2004) presented two methods for fitting the direct stress-strain representation of coated woven fabrics under biaxial tension. In the area of airbeams, Topping (1963) and Douglas (1969) studied the static response under bending loads, whereas the problem of wrinkling was initially studied by Comer and Levy (1962), Webber (1982) and Main et al (1994).…”

Section: Introductionmentioning

confidence: 99%

Effect of Fabric Webs on the Static Response of Spindle-Shaped Tensairity Columns

et al. 2010

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Tensairity is a lightweight structural concept comprising struts and cables stabilized by a textile membrane, which is inflated by low pressurized air. This paper addresses the effect of fabric webs inside the membrane hull on the static response of spindle-shaped Tensairity columns to axial compression. Two full-scale spindle-shaped columns, one without and one with webs, were fabricated and tested. The columns were subjected to axial compressive loading for various levels of internal air pressure in order to quantify its effect on the global structural response. It was found that the stiffness and the load bearing capacity for both columns increased with increasing air pressure. The experimental results also revealed the benefits of including fabric webs in the spindle configuration in terms of axial stiffness and buckling load. Comparisons with an analytical solution and finite element predictions showed good correlation for the axial stiffness in the case without webs. For the case with webs deviations between predicted and experimental results indicated that structural detailing and imperfections in the manufacturing process strongly influence the performance of Tensairity columns with internal webs.

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Direct stress–strain representation for coated woven fabrics

Cited by 82 publications

References 14 publications

A Multi-Step Linear Approximation Method for Nonlinear Analysis of Stress and Deformation of Coated Plain-Weave Fabric

A Multi-Step Linear Approximation Method for Nonlinear Analysis of Stress and Deformation of Coated Plain-Weave Fabric

New Solvent for Polyamide 66 and its use for Preparing Single-Polymer Composite Coated-Fabric

Effect of Fabric Webs on the Static Response of Spindle-Shaped Tensairity Columns

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