Mechanical properties of weft knit glass fibre/polyester laminates

Rudd, Chris; Owen, M. J.; Middleton, V.

doi:10.1016/0266-3538(90)90045-7

Cited by 79 publications

(28 citation statements)

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“…Leong et al [7], for Milano glass/vinylester laminates, showed that tensile strength and stiffness can be enhanced by stretching the knitted fabric whereby fibres are more favourably orientated and distributed to afford optimum reinforcement. Rudd et al [8] investigated plain weft-knit glass/polyester laminates both experimentally as well as analytically and showed that limited improvement to the stiffness could result with the use of cross-float stitches. Ramakrishna and Hull studied experimentally [9] and theoretically [10] the efficacy of using inlay fibres for enhancing the tensile properties of 1 × 1 rib weft-knit carbon/epoxy laminates.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Structure-Property Relationship of Knitted Composites

Khondker¹,

Herszberg

Leong

2001

Journal of Composite Materials

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The tensile and compressive behaviours of knitted composites in the wale and course directions were studied for their dependence upon knit architecture and varying knit/structural parameters, such as loop length and stitch density. Strength, modulus and strain-to-failure were investigated. In addition, Poisson's ratio of the composites under tensile loading was also studied. Post-failure examination was carried out on the test specimens using stereo-optical and scanning electron microscopy to analyse their fracture mechanisms. It has been found that any change in the mechanical properties of the knitted composites with respect to architecture and knit/structural parameters are broadly related to accompanying modifications to the state of the microstructural imperfections, viz. fibre bending and fibre crossover junctions, and also to the relative fibre distribution along the two principal loading axes, in the knit structure.

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Section: Introductionmentioning

confidence: 99%

An Investigation of the Structure-Property Relationship of Knitted Composites

Khondker¹,

Herszberg

Leong

2001

Journal of Composite Materials

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“…This geometry leads to a fabric that is more elastic and form-fitting than counterparts made from a woven fabric, a characteristic much appreciated when the fabric is used to reinforce a complex three-dimensional surface. However, the high level of curvature leads to a stress concentration in the yarns, with a consequent reduction in the maximum tensile strength (Rudd et al 1990). …”

Section: Coated Fabricsmentioning

confidence: 98%

The Design, Analysis and Construction of Tensile Fabric Structures

Beccarelli

2015

SpringerBriefs in Applied Sciences and Technology

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Coated fabrics and foils, used for architectural applications, are presented in the first part of this chapter. The current fibres and coatings available on the market are described in detail according to their performance, the advantages/ disadvantages and current applications in architecture. The second part is focused on the most common typologies of tension structures, the design process and the comparison with conventional roofing forms. The main physical and digital techniques for form-finding, static and dynamic analysis, patterning and manufacturing are described in detail. Architectural Fabric and FoilsIn membrane structures three main type of material are generally used: coated fabrics, open mesh fabrics and foils.Coated fabrics present a symmetrical structure of yarns arranged in two main orthogonal directions: warp and fill. The yarns consist of threads parallel or twisted together and can be made of several materials. While the structural function is mainly provided by the yarns, the protection from chemical and biological influences, fire-retardant behaviour, weld ability, waterproof qualities and UV ray resistance depend on the coating layer.For applications which do not require weather tightness, the use of open mesh fabrics is recently becoming quite popular. The weaving pattern can be designed in order to achieve the required level of solar protection and the design can take advantage of the reduced wind loads and of the substantial absence of ponding and wrinkles due to the permeable structure.

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“…In recent years, the application of knitted fabrics as structural reinforcement deserved great attention from the composite's industry [1][2][3][4][5][6][7][8][9][10]. This may be attributed to the unique properties they presented in comparison to other reinforcement fabric structures, such as woven and braided fabrics.…”

Section: Introductionmentioning

confidence: 99%