The upcoming revolution in ultrasonic guided waves

Rose, Joseph L.

doi:10.1117/12.897025

Cited by 39 publications

(21 citation statements)

References 63 publications

(44 reference statements)

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“…This research makes use of the hybrid analytical finite element method (FEM) [2]. This method applies the guided wave method to find modes that are sensitive to the particular defects that need to be detected.…”

Section: Methodsmentioning

confidence: 99%

Ultrasonic guided wave inspection of an interface between an anisotropic layer and a metallic half space

Gardner¹,

Rose²,

Moose³

2013

AIP Conference Proceedings

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Ultrasonic guided waves are used to inspect an interface for disbonds between a composite layer and an aluminum half space. The hybrid analytical finite element method is used to model the problem which involves generating dispersion curves and wave structures and searching for optimum excitation points for inspection. A physical experiment inspects from on top of the metal in a Rayleigh to leaky Rayleigh wave problem. Detection of the defect is achieved using peak frequency shift and signal difference coefficient as features.

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Section: Methodsmentioning

confidence: 99%

Ultrasonic guided wave inspection of an interface between an anisotropic layer and a metallic half space

Gardner¹,

Rose²,

Moose³

2013

AIP Conference Proceedings

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“…Lamb wave based SHM and NDE are growing rapidly due to their attractive features including the capability of travelling long distance with less energy loss comparing to bulk waves and sensitivity to small defects in the structure [1]. Over the last two decades, the advances of Lamb wave technologies have demonstrated the feasibility of damage detection in plate-like structures .…”

Section: Introductionmentioning

confidence: 99%

“…Although recent advances in Lamb wave technologies have demonstrated the feasibility of damage detection and localization, there still remain many challenging problems for real-world applications. The obstacles that have confronted researchers in this field are the multimodal and dispersive natures of Lamb waves [1]. There are at least two Lamb modes, A 0 and S 0 , existing simultaneously.…”

mentioning

confidence: 99%

Damage Assessment in Metal Plates by Using Laser Vibrometer Measurements

Tian

2014

Dynamic Behavior of Materials, Volume 1

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Lamb waves, the ultrasonic guided waves in plates, have been increasingly used for long range damage detection in plate-like structures. They have been considered as the new generation ultrasonic structural health monitoring (SHM) and nondestructive evaluation (NDE) approaches that are able to provide efficient and effective sensing for critical structural components. In this paper, the laser Doppler vibrometer measurements are used for the damage detection. The laser Doppler vibrometer provides a non-contact means to acquire the ultrasonic wavefield and visualize the wave propagation. The ultrasonic wavefield as a function of time and space contains a wealth of information regarding the wave propagation in the structure and wave interaction with the damage. The frequency-wavenumber analysis and phased array beamforming are adopted to process the ultrasonic wavefield and visualize the damage. The proposed methodology was verified through an experimental test on an aluminum plate with a bonded quartz rod as a simulated damage. Keywords Lamb waves • Laser vibrometer • Damage detection • Phased arrays • Frequency-wavenumber analysis IntroductionLamb wave based SHM and NDE are growing rapidly due to their attractive features including the capability of travelling long distance with less energy loss comparing to bulk waves and sensitivity to small defects in the structure [1]. Over the last two decades, the advances of Lamb wave technologies have demonstrated the feasibility of damage detection in plate-like structures . Various Lamb wave based NDE and SHM methods have been developed . Giurgiutiu and Bao developed an embedded-ultrasonic structural radar by using phased arrays of piezoelectric wafer active sensors (PWAS) for in situ NDE and SHM of thin-wall structures [2]. Wilcox developed omni-directional guided wave phased arrays with electromagnetic acoustic transducers for the rapid inspection of large areas of plate structures [6]. Michaels developed an in situ array of spatially distributed ultrasonic sensors for the purpose of damage detection, localization and characterization [12]. Leonard and Hinders developed a Lamb wave based tomography technique to visualize the damage in the structure [18]. Park et al. investigated a time reversal process of the Lamb signals for the purpose of damage detection. Although recent advances in Lamb wave technologies have demonstrated the feasibility of damage detection and localization, there still remain many challenging problems for real-world applications. The obstacles that have confronted researchers in this field are the multimodal and dispersive natures of Lamb waves [1]. There are at least two Lamb modes, A 0 and S 0 , existing simultaneously. When the product of the wave frequency and structure half-thickness is large, several wave modes (such as A 0 , A 1 , S 0 and S 1 ) can coexist. The dispersive nature shows the Lamb wave speed depends on the wave frequency [24]. Various wave modes that are dispersive will make the interpretation of Lamb wave signals very...

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“…The ultrasonic GLW technology has many exciting potential applications for detecting and monitoring structural damage in plate-like structures [1]. In general, various transduction devices such as piezoelectric transducers, piezocomposite transducers, electro-mechanical acoustic transducers, and laser-ultrasonic system have been used for GLW applications [2].…”

Section: Introductionmentioning

confidence: 99%

Galfenol-based directional magnetostrictive patch transducer for guided Lamb wave techniques

Yoo

Flatau

et al. 2014

SPIE Proceedings

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This paper presents the development of a Galfenol-based directional magnetostrictive patch transducer (MPT) and the results of experimental investigations with the developed MPT for guided Lamb wave (GLW) applications. We used three magnetostrictive materials such as nickel, polycrystalline Galfenol, and single-crystal-like Galfenol (i.e. a highly textured Galfenol) with a 1-inch-diameter thin disc form to design the proposed MPT used to evaluate the directionality for sensing the GLW propagation in thin aluminum plates. Prior to the GLW inspection using the MPTs, the magnetostriction of the magnetostrictive patches was experimentally measured by a strain gauge, and electron backscatter diffraction (EBSD) patterns were captured and analyzed to explore grain configurations and crystal orientations of the patches. The material level analysis validated that the highly textured Galfenol behaves like a single crystal with large magnetostriction along a <100> orientation. Therefore, the developed MPT using the single-crystallike Galfenol was expected to exhibit high directional sensitivity of the GLWs traveling in the metallic plate, corresponding to the preferred orientation of the Galfenol patch. The experimental study of the MPT-based GLW approach demonstrated that the MPT using the single-crystal-like Galfenol exhibits excellent sensitivity to the incoming GLWs along the <100> preferred direction, while the nickel-based MPT has omnidirectional GLW sensitivity in the plate specimen. In addition, the MPT using the polycrystalline Galfenol showed two preferred directions for sensing the GLWs, corresponding to <110> orientations.

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The upcoming revolution in ultrasonic guided waves

Cited by 39 publications

References 63 publications

Ultrasonic guided wave inspection of an interface between an anisotropic layer and a metallic half space

Ultrasonic guided wave inspection of an interface between an anisotropic layer and a metallic half space

Damage Assessment in Metal Plates by Using Laser Vibrometer Measurements

Galfenol-based directional magnetostrictive patch transducer for guided Lamb wave techniques

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