Mechanical properties of glass composites based on knitted preforms with inlays

Rao, RMVGK and Nahar, GA and Alagirusamy, R (2000) Mechanical properties of glass composites based on knitted preforms with inlays. Indian Journal of Fibre and Textile Research, 25. pp. 115-120. ISSN 0971-0426

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Abstract

An attempt has been made to improve the mechanical properties of the composites with knitted performs by introducing horizontal strands in the course direction in a flat-bed knitting machine. Flat knitted performs were produced with different proportions of axial inlay strands and the composite laminates were prepared using the vacuum-assisted resin transfer moulding technique. It is observed that the introduction of inlay strands influences the structure of the knitted preform by increasing course density, wale density and thickness. This result in the increased anisotropic behaviour of the composite laminate showing increased strength in the course direction and decreased strength in the wale direction. The flexural strength of the knitted preform composites increases in both wale and course directions with the introduction of inlay strands. Laminates from preforms with two inlays exhibit overall improved impact properties whereas those from preforms with one inlay show higher impact damage tolerance index. These observations are explained in terms of the change in fibre architecture brought about by the introduction of the inlay strands.

Item Type: Article
Uncontrolled Keywords: Composites, Glass fibre, Knitting, Mechanical properties, Textile preforms
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 28 Dec 2011 04:20
Last Modified: 28 Dec 2011 04:20
URI: http://nal-ir.nal.res.in/id/eprint/10164

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