Image-based sizing of surface-breaking cracks by SH-wave array ultrasonic testing

Kimoto, Katsunori; Ueno, S.; Hirose, Sohichi

doi:10.1016/j.ultras.2006.08.006

Cited by 24 publications

(12 citation statements)

References 25 publications

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“…Where only one side of the sample is accessible, standard inspection may use time of flight diffraction, or phased array techniques [14,15]. For a simple inspection procedure, a modified version of through-transmission using an angle beam probe can be used, where a wave is transmitted into a sample and the blocking of the wave by a far-side defect is imaged [16][17][18][19]. A line-focusing shear-vertical (SV) wave EMAT has recently been proposed for targeting small flaws positioned on the material back wall, using reflections from the defect back to the transducer [20,21].…”

Section: Introductionmentioning

confidence: 99%

Multiple Wavemode Scanning for Near and Far-Side Defect Characterisation

Xiang

Edwards

2020

J Nondestruct Eval

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The combination of ultrasonic inspections using different wavemodes can give more information than is available with single mode inspection. In this work, the response of shear and Rayleigh waves to surface-breaking defects propagating on the nearside and far-side of a sample is investigated. The directivity of shear waves generated by a racetrack coil electromagnetic acoustic transducer (EMAT) is identified and used to set an ideal separation for a pair of transmit-receive EMATs. Defects are indicated by a reduction in the transmitted Rayleigh wave amplitude, and by blocking of the shear wave. Used together, these can identify features in the bulk wave behaviour which are due to near-face surface-breaking defects, and give a full picture of both surfaces. By using a combination of the two wavemodes, the angle of propagation and length of any nearside defects can additionally be identified. A scanning method for samples is proposed.

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Section: Introductionmentioning

confidence: 99%

Multiple Wavemode Scanning for Near and Far-Side Defect Characterisation

Xiang

Edwards

2020

J Nondestruct Eval

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“…Baby et al [ 29 ] measured the size of surface break crack using the time-of-flight diffraction (TOFD) technique with a mean error of 0.13 mm. Kimoto et al [ 30 ] evaluated the depth of surface cracks using the anti-plane shear wave (SH wave). The ultrasonic testing is based on the detection and the interpretation of the ultrasonic waves reflected by cracks.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Evaluation of Depth of Surface Cracks Using Ultrasonic Frequency Analysis

Her

Lin

2014

Sensors

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Ultrasonic is one of the most common uses of a non-destructive evaluation method for crack detection and characterization. The effectiveness of the acoustic-ultrasound Structural Health Monitoring (SHM) technique for the determination of the depth of the surface crack was presented. A method for ultrasonic sizing of surface cracks combined with the time domain and frequency spectrum was adopted. The ultrasonic frequency spectrum was obtained by Fourier transform technique. A series of test specimens with various depths of surface crack ranging from 1 mm to 8 mm was fabricated. The depth of the surface crack was evaluated using the pulse-echo technique. In this work, three different longitudinal waves with frequencies of 2.25 MHz, 5 MHz and 10 MHz were employed to investigate the effect of frequency on the sizing detection of surface cracks. Reasonable accuracies were achieved with measurement errors less than 7%.

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“…Other researchers proposed the use of spatially distributed arrays, consisting of sensors distributed over a large area, as an effective approach to image damage inside and outside the area, enclosed by the array [5][6][7][8][9][10][11]. The method of application range from single element transducers to phased array elements for industrial inspection [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic beam steering using Neumann boundary condition in multiplysics

Zhaoguo

2012

Acta Mech Sin

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The traditional one-dimensional ultrasonic beam steering has time delay and is thus a complicated problem. A numerical model of ultrasonic beam steering using Neumann boundary condition in multiplysics is presented in the present paper. This model is based on the discrete wave number method that has been proved theoretically to satisfy the continuous conditions. The propagating angle of novel model is a function of the distance instead of the time domain. The propagating wave fronts at desired angles are simulated with the single line sources for plane wave. The result indicates that any beam angle can be steered by discrete line elements resources without any time delay.

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Image-based sizing of surface-breaking cracks by SH-wave array ultrasonic testing

Cited by 24 publications

References 25 publications

Multiple Wavemode Scanning for Near and Far-Side Defect Characterisation

Multiple Wavemode Scanning for Near and Far-Side Defect Characterisation

Non-Destructive Evaluation of Depth of Surface Cracks Using Ultrasonic Frequency Analysis

Ultrasonic beam steering using Neumann boundary condition in multiplysics

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