Physical and mechanical properties of unidirectional plant fibre composites: an evaluation of the influence of porosity

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    Abstract

    Unidirectional composites were made from filament wound non-treated flax yarns and polypropylene foils. With increasing composite fibre weight fractions from 0.56 to 0.72, porosity fractions increased from 0.04 to 0.08; a theoretical model was fitted to the data in order to describe the composite volumetric interaction between contents of fibre, matrix and porosity. In the model two porosity components were proposed, a process governed component and a structurally governed component. The composite axial stiffness and strength were in the range 27-29 GPa and 251-321 MPa, respectively. A modified version of the "rule-of-mixtures", supplemented with parameters of composite porosity content and anisotropy of fibre properties, were developed to improve the prediction of composite tensile properties. (C) 2003 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    JournalComposites Science and Technology
    Volume63
    Issue number9
    Pages (from-to)1265-1272
    ISSN0266-3538
    DOIs
    Publication statusPublished - 2003

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