Determination of dynamic properties of flax fibres reinforced laminate using vibration measurements

Detecting Damage in Carbon Fibre Composites using Numerical Analysis and Vibration Measurements

“…Vibration analysis is one of the most common methods for detecting damage in composite structures as it determines the structures' mode shapes and natural frequencies (Maia, et al 2003, Manoach, Samborski, et al 2012, Manoach, Warminski, et al 2016, Hammad and Moustafa 2020. Vibration analysis for cracked composite laminated plate and beam structures was developed by researchers (Ngo-Cong, Mai-Duy, et al 2011, Iliopoulos, Aggelis, et al 2015, El-Hafidi, Gning, et al 2017 who have concluded that damage is influenced by a structure's natural frequency, as the presence of damage decreases the natural frequency. Many investigators have also performed experimental and simulation studies to determine the frequency response function of carbon fibre composites and the dynamic damping behaviour of fabricated composites (Hu, Wang, et al 2006, Ding, Xie, et al 2015, Wang, Qin, et al 2017, Moustafa 2018.…”

Reclaimed Carbon and Flax Fibre Composites: Manufacturing and Mechanical Properties

“…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]. El-Hafidi et al proposed an experimental and numerical vibration technique for the identification of the linear viscoelastic properties of fibres reinforced epoxy composites that relies on the evolution of storage modulus and loss factor as observed through the frequency response and showed flax composites damping respectively five and two times higher than equivalent carbon and glass fibres composites [23].…”

An experiment-based method for parameter identification of a reduced multiscale parametric viscoelastic model of a laminated composite beam

“…w j ε i xy mem (t − j t) Memory stress (18) Monte Carlo simulations have been frequently used by different authors to construct models to identify the viscoelastic parameters from experimental FRF measurements (El-Hafidi et al 2017;Irazu and Elejabarrieta 2017;Zhang et al 2013). By this way, several discrete simulations are selected with carefully selected points of the parameters to be found, so the solution has to be computed several times.…”