Constitutive model to predict the viscoplastic behaviour of natural fibres based composites Articles uri icon

publication date

  • November 2016

start page

  • 8

end page

  • 18

volume

  • 155

international standard serial number (ISSN)

  • 0263-8223

electronic international standard serial number (EISSN)

  • 1879-1085

abstract

  • The mechanical behaviour of traditional composites is usually assumed as linear-elastic up to failure. However, composites based on natural fibres are characterized by non-linear elasticity, viscous effects and plastic strains before failure. This study presents a rheological model to predict the viscoplastic behaviour of natural fibres based composites. The model was calibrated using a stress-strain curve and two relaxation tests for three different composites reinforced with flax, jute and cotton fibres. The model predicted successfully the behaviour of biocomposites loaded at different strain rates. (C) 2016 Elsevier Ltd. All rights reserved.

keywords

  • Natural fibres; Rheological model; Viscoplasticity; Strain rate; Nonlinear deformation; Mechanical-properties; Biocomposites; Modulus; Plates