Hemp yarn reinforced composites – II. Tensile properties |
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| Affiliation: | 1. Materials Research Department, Risø National Laboratory, Technical University of Denmark, 4000 Roskilde, Denmark;2. Department of Civil Engineering, Technical University of Denmark, 2800 Lyngby, Denmark;1. Department of Materials Engineering, K. U. Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium;2. Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milan, Italy;3. Institute of Architecture of Textile, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland;1. University of Calabria, Department of Civil Engineering, Rende, CS 87036, Italy;2. ISISE, University of Minho, Department of Civil Engineering, Guimarães, Portugal;3. 2C2T, University of Minho, Department of Civil Engineering, Guimarães, Portugal;1. Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, via Terracini 28, Bologna 40131, Italy;2. Centro Interdipartimentale di Ricerca Industriale (CIRI) Edilizia e Costruzioni University of Bologna, via Lazzaretto 15/5, Bologna 40131, Italy;3. Centro Interdipartimentale di Ricerca Industriale (CIRI) Meccanica Avanzata e Materiali University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy;4. CMF TECHNOLOGY S.P.A., Via Bottegone 73, Pavullo nel Frignano (Modena) 41026, Italy;5. C.M.F. GreenTech, Via Di Vittorio 423/A, Cavezzo (Modena) 41032, Italy |
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| Abstract: | Whereas the first paper is addressing the characteristics of textile hemp yarn, this second paper is addressing the tensile properties of aligned hemp yarn composites under influence of a number of experimental variables: hemp yarn type, fibre volume fraction, thermoplastic matrix type, process temperature, conditioning humidity, and loading direction relative to the fibre direction. Altogether, the results show that aligned hemp yarn composites demonstrate the good potential of plant fibres as reinforcement in composites for structural components. The tensile performance of the hemp yarn composites is excellent. As an example, a fibre volume fraction of 0.48 results in a stiffness of 28 GPa and an ultimate stress of 280 MPa. It is demonstrated that the influence of experimental variables is well understood and can be quantitatively described. |
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