Journal of Materials Science

, Volume 50, Issue 4, pp 1996–2006 | Cite as

Creep behaviour of single hemp fibres. Part I: viscoelastic properties and their scattering under constant climate

  • Ousseynou Cisse
  • Vincent Placet
  • Violaine Guicheret-Retel
  • Frédérique Trivaudey
  • M. Lamine Boubakar
Original Paper


The literature on the time-dependent behaviour of single bast fibres such as flax and hemp is extremely poor. The aim of this extensive study is to characterise the long-term behaviour of elementary hemp fibres and to establish suitable constitutive laws. Single hemp fibres are shown to exhibit both instantaneous strain and delayed, time-dependent strain when tensile loaded under constant climate. The creep behaviour appears to be a logarithmic function of time with a high strain rate during the primary creep and a lower and constant one during the secondary creep. A large scattering both in time-dependent properties and behaviour was observed on a batch of 25 single fibres. Three main creep behaviours were observed. Type II is truly linear as a function of the logarithm of time while Type I and Type III are strongly nonlinear and can be described, respectively, by concave and convex functions. A rheological model based on an anisotropic viscoelastic law and on a truncated inverse Gaussian spectrum of viscous mechanisms was shown to successfully describe all the experimentally observed behaviours.


Creep Behaviour Hemp Natural Fibre Creep Curve Primary Creep 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would like to thank Camille Garcin and Jean-Marc Côte from the FEMTO-ST Institute for their assistance with some of the experiments.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Ousseynou Cisse
    • 1
  • Vincent Placet
    • 1
  • Violaine Guicheret-Retel
    • 1
  • Frédérique Trivaudey
    • 1
  • M. Lamine Boubakar
    • 1
  1. 1.Department of Applied Mechanics, FEMTO-ST InstituteUMR CNRS 6174, University of Franche-ComtéBesançonFrance

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