Enhancement of Selectivity in Nonlinear Ultrasonic Imaging of Closed Cracks Using Amplitude Difference Phased Array

Ohara, Yoshikazu; Shintaku, Yuichi; Horinouchi, Satoshi; Ikeuchi, Masako; Yamanaka, Kazushi

doi:10.7567/jjap.51.07gb18

Cited by 32 publications

(30 citation statements)

References 35 publications

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“…31,32) As a different PA imaging method, a method of combining a monolithic piezoelectric transmitter and a piezoelectric 1D array transducer was proposed to visualize closed cracks. [33][34][35][36] Here, a piezoelectric transmitter was employed to input a large-amplitude ultrasonic wave required for nonlinear ultrasonics. A 1D array transducer was used as a receiver for imaging.…”

Section: Introductionmentioning

confidence: 99%

Multi-mode 3D ultrasonic phased array imaging method using piezoelectric and laser ultrasonic system (PLUS)

Ohara¹,

Ulrich²,

Remillieux³

et al. 2023

Jpn. J. Appl. Phys.

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As a high-resolution 3D phased-array imaging method, a piezoelectric and laser ultrasonic system (PLUS) was proposed, which is a combination of a piezoelectric transmitter and an ultra-multiple scan of a laser Doppler vibrometer. Thus far, PLUS has used an identical mode for incident and scattered waves. On the other hand, the ultrasonic scattering phenomena can accompany the mode conversion, which may provide further information on defects. In this paper, we propose multi-mode PLUS to enhance its imaging capability and attain more robustness. After describing the principle of multi-mode PLUS, we validated the imaging algorithm and demonstrated the improvement in the image resolution using a dataset of simulated received waves for the longitudinal-wave incidence to scatterers. Furthermore, we experimentally demonstrated the efficacy of multi-mode PLUS in a specimen with branched stress corrosion cracking.

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Section: Introductionmentioning

confidence: 99%

Multi-mode 3D ultrasonic phased array imaging method using piezoelectric and laser ultrasonic system (PLUS)

Ohara¹,

Ulrich²,

Remillieux³

et al. 2023

Jpn. J. Appl. Phys.

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“…On the other hand, we previously proposed a method of combining a single-element piezoelectric transducer and a linear array transducer to image closed cracks 7 , 8 , 16 , 34 , 35 . Here, a piezoelectric transmitter was used to provide the large-amplitude incidence required for nonlinear ultrasonics 36 .…”

Section: Introductionmentioning

confidence: 99%

Exploring 3D elastic-wave scattering at interfaces using high-resolution phased-array system

Ohara

Remillieux

Ulrich

et al. 2022

Sci Rep

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The elastic-wave scattering at interfaces, such as cracks, is essential for nondestructive inspections, and hence, understanding the phenomenon is crucial. However, the elastic-wave scattering at cracks is very complex in three dimensions since microscopic asperities of crack faces can be multiple scattering sources. We propose a method for exploring 3D elastic-wave scattering based on our previously developed high-resolution 3D phased-array system, the piezoelectric and laser ultrasonic system (PLUS). We describe the principle of PLUS, which combines a piezoelectric transmitter and a 2D mechanical scan of a laser Doppler vibrometer, enabling us to resolve a crack into a collection of scattring sources. Subsequently, we show how the 3D elastic-wave scattering in the vicinity of each response can be extracted. Here, we experimentally applied PLUS to a fatigue-crack specimen. We found that diverse 3D elastic-wave scattering occurred in a manner depending on the responses within the fatigue crack. This is significant because access to such information will be useful for optimizing inspection conditions, designing ultrasonic measurement systems, and characterizing cracks. More importantly, the described methodology is very general and can be applied to not only metals but also other materials such as composites, concrete, and rocks, leading to progress in many fields.

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“…Consequently, it is hard to think of a single physical mechanism responsible for the elastic nonlinearity observed and, thus, it could be important to highlight differences in nonlinear materials with different microstructures, either intrinsic or damaged induced [33][34][35]. Nevertheless, to achieve this purpose, a finer analysis is necessary, which requires developing novel experimental approaches beyond those existing in the literature, i.e., harmonics and sidebands analysis [36,37], determination of the resonance frequency shift [25,38], quantification of the loss of proportionality [39,40], analysis of subharmonics [41] and others [42,43].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Elastic Nonlinearity Using Continuous Waves: Validation and Applications

et al. 2019

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The nonlinear elastic response of consolidated granular or damaged materials is the result of the combination of nonlinear attenuation and velocity, coupled with hysteresis, which is linked to non equilibrium effects (often termed conditioning). Thus, a preliminary step towards the comprehension of the physical mechanisms responsible of the nonlinear elastic behaviours consists in quantifying and separating the various contributions. To this purpose, an approach based on a semi-analytical treatment of signals resulting from a monochromatic continuous wave excitation can be successfully implemented. Its validation is discussed here, applying the proposed approach to the analysis of numerical data obtained by using a finite difference spring model code. The accuracy, sensibility and robustness of the protocol are verified in different nonlinear conditions.

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Enhancement of Selectivity in Nonlinear Ultrasonic Imaging of Closed Cracks Using Amplitude Difference Phased Array

Cited by 32 publications

References 35 publications

Multi-mode 3D ultrasonic phased array imaging method using piezoelectric and laser ultrasonic system (PLUS)

Multi-mode 3D ultrasonic phased array imaging method using piezoelectric and laser ultrasonic system (PLUS)

Exploring 3D elastic-wave scattering at interfaces using high-resolution phased-array system

Analysis of Elastic Nonlinearity Using Continuous Waves: Validation and Applications

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