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Estimation of axial stiffness of plant fibres from compaction of non-woven mats
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics. (Byggteknik)
2014 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 25, no 3, 035601- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 25, no 3, 035601- p.
Keyword [en]
elastic measurement, compaction testing, fibre stiffness, micromechanics, fibre mat
National Category
Engineering and Technology
Research subject
Engineering science with specialization in Applied Mechanics
Identifiers
URN: urn:nbn:se:uu:diva-222936DOI: 10.1088/0957-0233/25/3/035601ISI: 000332698400029OAI: oai:DiVA.org:uu-222936DiVA: diva2:712988
Available from: 2014-04-17 Created: 2014-04-15 Last updated: 2017-12-05Bibliographically approved

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Gamstedt, KristoferBommier, Florian

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