Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19399
Title: Multi-scale study of tensile properties and large deformation mechanisms of polyethylene terephthalate/polypropylene knitted composites
Authors: Lam, SW
Xue, P
Tao, XM 
Yu, TX
Keywords: Polymer-matrix composites
Textile composites
Microstructure
Scanning electron microscopy
Large plastic deformation
Issue Date: 2003
Publisher: Pergamon Press
Source: Composites science and technology, 2003, v. 63, no. 10, p. 1337-1348 How to cite?
Journal: Composites science and technology 
Abstract: This paper is concerned with large deformation tensile properties and energy absorption mechanisms of thermoplastic weft-knitted composites, fabricated by compression molding co-knitted preforms consisted of polyester (polyethylene terephthalate) and polypropylene continuous filament yarns. The large deformation mechanisms have been studied by observing morphological changes during quasi-static tensile loading in meso- and micro-scales. In-situ SEM observations have identified critical points including brittle matrix crack initiation from imperfect composite surfaces, fibre/matrix debonding, serious loop distortion along the loading directions and fibre straining during the large deformation until composite fracture. The energy absorption mechanisms have been identified as localized matrix compression and extension, matrix crack propagation, localized loop distortion, and fibre straining during the deformation process. Effects of fabric structure, fibre volume fraction and plasma treatment on fibre surface have been also studied.
URI: http://hdl.handle.net/10397/19399
ISSN: 0266-3538
EISSN: 1879-1050
DOI: 10.1016/S0266-3538(02)00077-5
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