Prediction of Dissipative Properties of Flax Fibers Reinforced Laminates by Vibration Analysis

E-ISSN： 1662-7482|2016|822|411-417

ISSN： 1660-9336

Source： Applied Mechanics and Materials, Vol.2016, Iss.822, 2016-02, pp. : 411-417

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Abstract

This study proposes an experimental-numeric method to identify the viscoelastic properties of flax fibres reinforced composite laminate (flax/epoxide). The used method consists in identifying the evolutions of both loss factor and stiffness when vibrational frequency changes. In this way, several free-free symmetrically guided beams are excited on a dynamic range of 10 to 4000 Hz with sweep sine excitation focused around the 4-first’s modes. Fractional derivative Zener model is used to identify the on-axis ply complex moduli and describe the laminate dissipative linear behavior with the classical laminate theory. Results obtained on a quasi-isotropic laminate show that this model adequately predicts the vibrational behavior of the tested laminates.