A Lamb-wave-based technique for damage detection in composite laminates

Ng, Ching‐Tai; Veidt, Martin

doi:10.1088/0964-1726/18/7/074006

Cited by 135 publications

(106 citation statements)

References 28 publications

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“…Following earlier investigations [13,15,[22][23][24][25], the A 0 Lamb wave is the focus in this study because of its sensitivity to small defects due to its shorter wavelength compared to S 0 and SH 0 Lamb waves at the same excitation frequency.…”

Section: Three-dimensional Finite Element Simulation Of Lamb Wave Scamentioning

confidence: 99%

“…As shown in Fig 11, wave based imaging algorithms [13,42], especially for Lamb wave diffraction tomography [31][32], if the delamination is located far away from the mid-thickness of the composite laminates.…”

Section: Delaminations In the Quasi-isotropic Composite Laminatementioning

confidence: 99%

“…Different techniques [5][6][7][8] have been developed to ensure the safety and reduce maintenance costs of structures. Guided waves (GWs) have demonstrated great potential for damage detection in a wide range of structural elements, including beams [9], pipes [10], metallic plates [11], and, more recently, composite laminates [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Ng¹,

Veidt²,

Rose³

et al. 2012

Journal of Sound and Vibration

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Section: Three-dimensional Finite Element Simulation Of Lamb Wave Scamentioning

confidence: 99%

Section: Delaminations In the Quasi-isotropic Composite Laminatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Ng¹,

Veidt²,

Rose³

et al. 2012

Journal of Sound and Vibration

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“…The use of this technique on its own is quite limited since only the path between transmitter and receiver is inspected. Thus, a network of transducers covering the structure has been performed by many researchers (Zhao et al 2007;Lissenden and Rose 2008;Ng and Veidt 2009) in order to interrogate in a pitch-catch configuration the entire structure. With this technique, the system is able to map the inspected area by analysing all the paths between transducers.…”

Section: Damage Detectionmentioning

confidence: 99%

Damage Sensing in Blades

Crespo

2016

Mare-Wint

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This chapter is divided into three parts; the problem, possible solutions and the chosen option to address the problem, which is my PhD topic within the project MAREWINT. So firstly, the chapter presents an overview of the typical damages that a wind turbine blade can suffer during its life operation. Then, a review of different Structural Health Monitoring (SHM) techniques which are currently being investigated for wind turbine blades is presented. Finally, the chapter provides the state-of-the-art of Guided Wave Technology in composite materials; where different aspects of this SHM technique are explained in more detail. IntroductionWind energy is an important renewable energy source which has gained high relevance during the last decades. Different countries have released plans to invest in wind energy in the future years; such as the USA that will generate 20 % of the country's electricity from wind power by 2030 or Denmark that have set the targets of producing 50 % of the power from the wind by 2020 and also of making Denmark completely free of dependence on fossil fuels by 2050. So, the use of wind power is not expected to decrease within the next decade (Márquez et al. 2012). The trend is to manufacture bigger wind turbines and deploy them offshore. These new wind turbines have around 6 MW power output, 120-metre height tower and 80-metre long blades. They are designed to be operating in rough conditions in difficult-to-reach areas. Therefore, the deployment of Structural Health Monitoring (SHM) techniques becomes essential in order to assess remotely the integrity of the structure. The advantages of using these techniques are many (Schulz and Sundaresan 2006), such as reducing expensive costs for periodic inspections of turbines which are hard to reach, prevention of unnecessary replacement of components based on time of use, or minimizing down time and frequency of sudden breakdowns.

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“…With the advantages of long propagation distance and high sensitivity to small damage, guided ultrasonic waves have proven effective for damage inspection in large composite panels [1][2][3][4][5]. In recent years, full time-space wavefields of guided waves, measured by non-contact laser Doppler vibrometers, have been extensively studied for use in damage detection [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Multi-site delamination detection and quantification in composites through guided wave based global-local sensing

Tian¹,

Leckey²,

Yu³

2017

AIP Conference Proceedings

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Abstract. This paper presents a guided wave based global-local sensing method for rapid detection and quantification of multi-site delamination damage in large composite panels. The global-local approach uses a hybrid system consisting of a piezoelectric transducer (PZT) for generating guided waves and a non-contact scanning laser Doppler vibrometer (SLDV) for acquiring guided wave data. The global-local method is performed in two steps. First, a phased array configured of a small number of SLDV scan points (for example 10×10 points in a rectangular grid array) performs inspection over the entire plate to detect and locate damage. Local areas are identified as potential damage regions for the second step. Then high density wavefield measurements are taken over the identified areas and wavefield analysis is performed to quantitatively evaluate the damage. For the proof of concept in case with multi-site damage, the global-local approach is demonstrated on a carbon fiber reinforced polymer (CFRP) composite plate with two sites of impact-induced delamination damage. In the first step, the locations of two delamination sites are detected by the phased array method. In the second step, the delamination size and shape are evaluated using wavefield analysis. The detected delamination location, size and shape agree well with those of ultrasonic C-scan and the method led to a 93% reduction in inspection time compared to a full SLDV dense grid scan.

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A Lamb-wave-based technique for damage detection in composite laminates

Cited by 135 publications

References 28 publications

Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Damage Sensing in Blades

Multi-site delamination detection and quantification in composites through guided wave based global-local sensing

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