Propagation behaviour of guided waves in tapered sandwich structures and debonding identification using time reversal

Mustapha, Samir; Ye, Lin

doi:10.1016/j.wavemoti.2015.03.010

Cited by 57 publications

(37 citation statements)

References 31 publications

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“…is is the range of frequencies in which Lamb waves propagating in the top laminate skin shows leaky behaviour meaning that it attenuates quickly because of loss of energy to the core material. ese studies are based on both numerical and experimental investigation, and attenuation characteristics of the core material are accounted for [5][6][7][8][9][10]. It is also shown that, at frequencies lower than in the abovementioned studies, debonding between the core material and the skin of the sandwich structure causes creation of reflected waves [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, by transient simulation of GW propagation, which can be done using the FE models, it is possible to calculate the amplitude and consequently energy transmission of the propagated waves. e models are either 2D with plane strain approximation [5,[17][18][19], or 3D models using shell or solid elements [6,8,10,13,20,21]. In the 3D FE models, the sandwich structures are modelled using two plates with shell elements for the top and bottom layers representing the laminate skin with a core which is modelled by solid elements [6,13,22].…”

Section: Introductionmentioning

confidence: 99%

“…Studies show that assuming a homogeneous isotropic material for the foam or honeycomb core leads to reasonable accuracy for the fundamental wave modes in the low range of frequencies [10,23]. e simulations are mostly performed using explicit dynamic procedures, and Abaqus is the commercial code which has been widely used for these types of studies [5,6,8,13,20].…”

Section: Introductionmentioning

confidence: 99%

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Guided Wave Energy Transfer in Composite Sandwich Structures and Application to Defect Detection

Shoja

Berbyuk

Boström

2018

Shock and Vibration

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In this study, energy transmission of the guided waves propagating in composite sandwich structures is investigated in a wide range of frequencies using numerical simulations. e effects of different potential defects on the guided wave energy transmission are explored in such structures. Furthermore, the accuracy of homogenization methods for finite element modelling of guided wave propagation in sandwich structures is studied with the aim of reducing the computational burden of the simulations in the low range of frequencies. A 2D finite element model is developed and verified by comparing the results with the dispersion curves. In order to examine homogenization methods, the homogenized stiffness matrices of the sandwich material and the laminate skin are calculated using classical laminate theory. Results show that core-skin debonding causes absence of wave energy leakage from the skin to the core material in that region in a specific range of frequencies. e results are also obtained for the delamination within the skin and compared with the healthy material. Finally, for the guided waves in the low range of frequencies, it is possible to use the homogenization methods to create the finite element models and reduce the solution time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Guided Wave Energy Transfer in Composite Sandwich Structures and Application to Defect Detection

Shoja

Berbyuk

Boström

2018

Shock and Vibration

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“…damage detection algorithms for assessing disbonds, delamination, cracks/notches, corrosion, and holes in composite structures. [6][7][8][9][10][11][12] Some authors presented reviews of Lamb wave propagation techniques for NDE and structural health monitoring (SHM) of composite structures using bonded piezoelectric transducers. [13,14] It is also referred that the identification of different wave modes in the propagating Lamb wave signals plays a significant role in the SHM of composite structures using piezoelectric transducers.…”

mentioning

confidence: 99%

“…[7,8,11,16] The application of a piezoelectric transmitter-sensor network to study the guided wave propagation characteristics in disbonded sandwich structures was presented by many authors. [3,11,[16][17][18] Several numerical simulation techniques of guided wave propagation in composites was presented in literature. [19][20][21][22][23][24][25] Theoretical analysis was also carried out to study the dispersion characteristics and elastic response of the propagating waves in composite structures.…”

mentioning

confidence: 99%

Ultrasonic Lamb wave‐based debonding monitoring of advanced honeycomb sandwich composite structures

Sikdar

Ostachowicz

2018

Strain

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Honeycomb sandwich composites are extensively used in military shelters, aerospace structures, ground transportation structures, auto‐racing bodies, ship panels, and other special purpose structures requiring lightweight construction materials. But debondings at the face‐sheet‐to‐core junctions frequently occur due to the variable operating and loading conditions, which may menace the safety and overall integrity of the structural assembly. This paper aims to effectively identify such hidden debonding regions in these advanced structures, using Lamb wave‐based monitoring technique. A semianalytical analysis of Lamb wave dispersion in a healthy sandwich structure is carried out to identify various Lamb modes and to study their propagation phenomenon. A combined finite element‐based simulation and experimental analysis of Lamb wave propagation in sandwich panels (healthy and with debonding) are then carried out using piezoelectric transducer networks. It is observed that the presence of debonding significantly reduces the propagating Lamb wave mode amplitudes. A debonding detection algorithm, which uses the differential changes in Lamb mode amplitudes, is applied to efficiently identify single and multiple debonding regions in the structure.

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Ultrasonic Methods

Samaitis

Jasiūnienė

Paćko

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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Ultrasonic inspection is a well recognized technique for non-destructive testing of aircraft components. It provides both local highly sensitive inspection in the vicinity of the sensor and long-range structural assessment by means of guided waves. In general, the properties of ultrasonic waves like velocity, attenuation and propagation characteristics such as reflection, transmission and scattering depend on composition and structural integrity of the material. Hence, ultrasonic inspection is commonly used as a primary tool for active inspection of aircraft components such as engine covers, wing skins and fuselages with the aim to detect, localise and describe delaminations, voids, fibre breakage and ply waviness. This chapter mainly focuses on long range guided wave structural health monitoring, as aircraft components require rapid evaluation of large components preferably in real time without the necessity for grouding of an aircraft. In few upcoming chapters advantages and shortcommings of bulk wave and guided wave ultrasonic inspection is presented, fundamentals of guided wave propagation and damage detection are reviewed, the reliability of guided wave SHM is discussed and some recent examples of guided wave applications to SHM of aerospace components are given.

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Propagation behaviour of guided waves in tapered sandwich structures and debonding identification using time reversal

Cited by 57 publications

References 31 publications

Guided Wave Energy Transfer in Composite Sandwich Structures and Application to Defect Detection

Guided Wave Energy Transfer in Composite Sandwich Structures and Application to Defect Detection

Ultrasonic Lamb wave‐based debonding monitoring of advanced honeycomb sandwich composite structures

Ultrasonic Methods

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