Numerical and Experimental Characterization of the Dynamic Properties of Flax Fiber Reinforced Composites

Abstract

In this paper, the damping properties of flax fiber reinforced composites were investigated. Throughout a series of resonance vibration tests, the natural frequencies and the modal damping were evaluated. A numerical modelling was also produced by using a finite element model to determine the energies dissipated in each layer of the laminate structure in order to calculate the damping factors. The results obtained for the dynamic properties of flax fiber reinforced composites from experimental data and numerical analysis method show close agreement. The effect of fiber orientations on the damping behavior for this material was investigated. Another part of our work was to insert a thin viscoelastic layer within the flax fiber laminate. The interposition of this viscoelastic layer had a significant influence on the vibration behavior, bending stiffness and damping factors.

Reclaimed Carbon and Flax Fibre Composites: Manufacturing and Mechanical Properties

“…The vibration damping was estimated using a half-power bandwidth method, also known as peak picking, from measured frequency response functions (FRFs) [51]. A similar procedure was also used in [16,19,22] to characterise the damping of flax fibre reinforced composites.…”

“…Prabhakaran et al, not only showed the superior vibration damping properties of flax fibres when compared with glass fibre composites, but also demonstrated higher sound absorption coefficients both at high (2000 Hz) and low (100 Hz) frequencies [18]. Daoud et al investigated the damping properties of flax fibre reinforced composites via resonance vibration tests and produced numerical model to predict the damping factors investigating the effect of the fibre orientations and of a thin viscoelastic interleaf [19,20]. Rahman et al showed a strong dependence in natural frequencies and loss factors from fibre orientation and content in a flax fibre reinforced polypropylene matrix [21,22].…”

Effect of an Interleave Natural Viscoelastic Layer on the Dynamic Behaviour of a Bio-Based Composite

“…This analyser associated with a computer (PC) set the acquisition conditions and then did the analysis of the signals acquired. Frequency response analyses were carried out to obtain the natural frequencies using the fre-H. Daoud [7], Daoud et al [6] and Hammami et al [8]. Using this method the loss factor η_n was calculated by equation 1.…”

“…In this work, experimental analyses were carried out to investigate the damping factor of composites with flax fibre to determine the frequency responses and the damping properties of the structure. These experiments were carried out using the same procedure used by Daoud et al [6]. The results obtained showed that natural fibres have promising effects on damping vibration.…”

Natural Plant Fiber Composites-Constituent Properties and Challenges in Numerical Modeling and Simulations

“…Another advantage of natural fibers over carbon and glass fibers is their better damping properties [Daoud et al, 2016]. Damping alleviates the relative motions in an object and converts kinetic energy into heat or other disposable energy types.…”