Estimation of axial stiffness of plant fibres from compaction of non-woven mats

E. K. Gamstedt, E. Bommier, Bo Madsen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Plant fibres are known to show a large variability in stiffness, which makes it time-consuming to experimentally characterize this property by conventional tensile testing. In this work, an alternative method is used, where the average fibre stiffness is back-calculated from compaction tests of in-plane randomly oriented fibre mats. The model by Toll is used to relate the load-displacement curve from the test to the Young modulus of the fibre, taking into account the natural variability in fibre cross section. Several tests have been performed on hemp fibre mats and compared with results from single-fibre tensile testing. The average back-calculated Young's modulus of the fibres was 45 GPa, whereas the average value from tensile testing ranged from 30 to 60 GPa. The straightforward compaction test can be useful in ranking of fibre stiffness, provided that the mat is composed of well-separated fibres and not of twisted yarns.
    Original languageEnglish
    Article number035601
    JournalMeasurement Science and Technology
    Volume25
    Issue number3
    Number of pages12
    ISSN0957-0233
    DOIs
    Publication statusPublished - 2014

    Keywords

    • ENGINEERING,
    • INSTRUMENTS
    • YARN REINFORCED COMPOSITES
    • HEMP FIBER
    • ELASTIC-MODULUS
    • NATURAL FIBERS
    • FLAX FIBERS
    • WOOD FIBERS
    • PAPER
    • HYGROEXPANSION
    • CONTACTS
    • GLASS
    • elastic measurement
    • compaction testing
    • fibre stiffness
    • micromechanics
    • fibre mat
    • Compaction
    • Elastic moduli
    • Materials testing apparatus
    • Micromechanics
    • Tensile testing
    • Textile fibers
    • Weaving
    • Axial stiffness
    • Compaction test
    • Compaction testing
    • Fibre cross-section
    • Load-displacement curve
    • Natural variability
    • Randomly-oriented fibres
    • Young's Modulus
    • Stiffness

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