Modeling lamb wave propagation in visco-elastic composite plates using a fifth-order plate theory

Influence of Composite Thickness on Ultrasonic Guided Wave Propagation for Damage Detection

“…Fibre-reinforced plastic composites are now a prominent material in modern commercial airframe aircraft [ 1 , 2 ]. These types of composites have a superior strength-to-weight ratio, higher tensile strength and stiffness, good properties of corrosion/fatigue resistance and higher thermal stability [ 1 , 2 , 3 , 4 , 5 ]. For instance, the usages of composites are up to 50% by weight content in aircraft structures for Boeing Dreamliner 787 and 52% for Airbus 350 [ 2 ].…”

“…However, this information is not known; therefore, it is important that during the design and development phase of any SHM system, a detailed investigation is carried out to choose the optimum parameters of the UGW (frequency, amplitude and mode), which will interact with probable damage types in the plate and enable a reliable damage detection. Many studies have been numerically carried out to capture the guided wave propagation properties in thin composite structures of different layups, materials, complexities and sizes numerically, since experimental investigations are often timely and expensive to allow a deeper understanding of the wave/damage interaction to optimise the parameters of the SHM system, towards condition-based maintenance concepts [ 5 , 11 , 18 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”

Prediction of frequency and spatially dependent attenuation of guided waves propagating in mounted and unmounted A380 parts made up of anisotropic viscoelastic composite laminates

“…The representatives are the approaches based on Legendre polynomials [22][23][24] and higher-order plate theory. [25][26][27] Furthermore, discrete numerical methods are widely applied as well to solve the problem of complex waves in multilayered viscoelastic plates due to their easy implementation. For instance, one can cite the wave finite element method using the Floquet periodicity condition, 28,29 the spectral collocation method based on Chebyshev polynomials, 30,31 and the semi-analytical finite element method (SAFE) suitable for arbitrary cross-section waveguides.…”

An experimental technique for evaluating viscoelastic damping using ultrasonic guided waves

“…Viscoelasticity is a vital characteristic of coatings in ultrasonic long-range inspection. The guided wave energy is drastically attenuated in the presence of a viscoelastic material [22,23]. Other factors apart from wave propagation, such as mode type, frequency band, microscopic and macroscopic variations in the waveguide, and the distance between the exciting and capturing sensors can also directly affect the attenuation level [23][24][25][26].…”

“…The guided wave energy is drastically attenuated in the presence of a viscoelastic material [22,23]. Other factors apart from wave propagation, such as mode type, frequency band, microscopic and macroscopic variations in the waveguide, and the distance between the exciting and capturing sensors can also directly affect the attenuation level [23][24][25][26]. Various studies have developed techniques for evaluating the viscoelastic property.…”