Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

Ochôa, Pedro; Infante, V.; Silva, José M.; Groves, Roger M.

doi:10.1016/j.compositesb.2015.06.010

Cited by 58 publications

(27 citation statements)

References 18 publications

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“…Among all of them, Lamb wave techniques are widely recognised as some of the most promising approaches for SHM of composite 2 structures [5]. In previous work, the authors have investigated barely visible impact damage at multiple locations using Lamb wave techniques [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of the influence of welding process parameters on Lamb wave transmission across ultrasonically welded thermoplastic composite joints

Ochôa

Villegas

Groves

et al. 2018

Mechanical Systems and Signal Processing

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Section: Introductionmentioning

confidence: 99%

Experimental assessment of the influence of welding process parameters on Lamb wave transmission across ultrasonically welded thermoplastic composite joints

Ochôa

Villegas

Groves

et al. 2018

Mechanical Systems and Signal Processing

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“…This case may require multiple excitation sources. Therefore, establishment of a actuator/sensor network and the relative position of actuators/sensors to potential damage sites are two key factors for the development of ultrasonic guided-wave based NDT and SHM techniques [11,43].…”

Section: Effects Of Multiple Impactsmentioning

confidence: 99%

“…Hence, most of the research on guided-wave propagation in impacted laminates has been based on experiments and numerical modelling. Regarding experimental characterisation, low-velocity impact damage is normally introduced into a laminate through drop weight [10][11][12] or quasi-static indentation tests [13][14][15]. The location and size of damage and/or flaws can be ascertained by the phase shift and amplitude difference between the sensing signals acquired before and after impact [10,11,16].…”

Section: Introductionmentioning

confidence: 99%

An integrated numerical model for investigating guided waves in impact-damaged composite laminates

Zhang

Sun

Eaton

et al. 2017

Composite Structures

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This paper presents a novel numerical technique that combines predictions of impact-induced damage and subsequent ultrasonic guided-wave propagation in composite laminates, with emphasis on the development and verification of the modelling framework. Delamination and matrix cracking are considered in the modelling technique, which is validated by experimental measurements on a carbon-fibre/epoxy plate using a drop-weight impact tower and a scanning laser vibrometer. Good agreement has been found between simulations and experiments regarding the impact response and globallocal wavefields. Effects of these two damage modes, damage extent and multiple impacts on guided waves are studied using the modelling tool. Matrix cracking leads to lower wavefield scattering compared with delamination, particularly in un-damaged regions.The modelling strategy can provide valuable guidelines for optimising health-monitoring arrangements on composite structures that are susceptible to impacts, and the guidedwave model can also be integrated with other numerical models for predicting internal flaws in composite laminates.

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“…The results showed that defect characterization was possible if a suitable criterion for modal selection was established. Ochoa et al [36] used two zeroth-order Lamb wave modes to detect various types of invisible impact damage in composite materials. Because the digital shearography and ultrasonic C-scan technology could identify 5-and 10-J impact damage and the impact damage of 3-J could not be detected, the results of the Lamb wave detection were confirmed by comparison.…”

Section: Lamb Modementioning

confidence: 99%

The Rapid Detection Technology of Lamb Wave for Microcracks in Thin-Walled Tubes

Wang

Yang

2019

Applied Sciences

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Thin-walled tubes are a kind of pressure vessel formed by a stamping and drawing process, which must withstand a great deal of sudden pressure during use. When microcrack defects of a certain depth are present on its inner and outer surfaces, severe safety accidents may occur, such as cracking and crushing. Therefore, it is necessary to carry out nondestructive testing of thin-walled tubes in the production process to eliminate the potential safety hazards. To realize the rapid detection of microcracks in thin-walled tubes, this study could be summarized as follows: (i) Because the diameters of the thin-walled tubes were much larger than their thicknesses, Lamb wave characteristics of plates with equal thicknesses were used to approximate the dispersion characteristics of thin-walled tubes. (ii) To study the dispersion characteristics of Lamb waves in thin plates, the detection method of the A 0 mode was determined using the particle displacement-amplitude curve. (iii) Using a multi-channel parallel detection method, rapid detection equipment for Lamb wave microcracks in thin-walled tubes was developed. (iv) The filtering peak values for defect signal detection with different depths showed that the defect detection peak values could reflect the defect depth information. (v) According to the minimum defect standard of a 0.045-mm depth, 100,000 thin-walled tubes were tested. The results showed that the missed detection rate was 0%, the reject rate was 0.3%, and the detection speed was 5.8 s/piece, which fully meets the actual detection requirements of production lines. Therefore, this study not only solved the practical issues for the rapid detection of microcracks in thin-walled tubes but also provided a reference for the application of ultrasonic technology for the detection of other components. Appl. Sci. 2019, 9, 3576 2 of 15 quantitatively, which can easily lead to misjudgment [10]. Magnetic particle testing is more suitable for surface defect detection, and it is difficult to quantitatively detect the depth of a flaw [10]. The X-ray method is mainly used to detect the volume of the defect inside the object. For an area defect, there will be an overlap of the front and back, and the angle between the ray beam and the orientation of the crack cannot exceed 10 • ; otherwise, it cannot be detected [10]. Penetration detection is limited to the defects of the surface opening. The penetrating liquid pollutes the parts and the environment and is not suitable for on-line detection [10]. Ultrasonic testing is sensitive to the area of the defect inside the object and can locate the relative size and location of the defect. The detection depth is much greater than other detection methods, and thus, it has been widely used [10]. For thin-walled tubes, ultrasonic Lamb waves are usually used for testing [11].The ultrasonic detection principle of thin-walled tubes is the same as that of pipe, and there are many studies on the principle, method, and application of Lamb wave detection of pipe for reference. Therefore, based...

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Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

Cited by 58 publications

References 18 publications

Experimental assessment of the influence of welding process parameters on Lamb wave transmission across ultrasonically welded thermoplastic composite joints

Experimental assessment of the influence of welding process parameters on Lamb wave transmission across ultrasonically welded thermoplastic composite joints

An integrated numerical model for investigating guided waves in impact-damaged composite laminates

The Rapid Detection Technology of Lamb Wave for Microcracks in Thin-Walled Tubes

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