Constitutive model to predict the viscoplastic behaviour of natural fibres based composites. (1st November 2016)

• Record Type: Journal Article
• Authors: Rubio-López, A.; Hoang, T.; Santiuste, C.
• Is Part Of: Composite structures. Volume 155(2016)
• Page Start: 8
• Page End: 18
• Publication Date: 2016-11-01
• Subjects: Natural fibres -- Rheological model -- Viscoplasticity -- Strain rate; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2016.08.001
• Languages: English
• ISSNs: 0263-8223

Abstract

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.