Noninvasive low-cycle fatigue characterization at high depth with photoacoustic eigen-spectrum analysis

Gao, Xiaoxiang; Tao, Chao; Zhu, Rong; Liu, Xiaojun

doi:10.1038/s41598-018-26140-x

Cited by 4 publications

(3 citation statements)

References 49 publications

(63 reference statements)

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“…The frequency responses of the microparticles were also numerically modeled in COMSOL, and they are in good agreement with the experimental results. Xiaoxiang Gao et al has shown eigenvalue results for polystyrene microparticles having same elastic parameters (Young’s modulus and Poisson’s ratio) is in close proximity to the predicted eigenvalues for our PS20, thus confirming the validity of our results [ 20 ]. The eigenfrequencies depend inversely on the diameter of the microparticles.…”

Section: Resultssupporting

confidence: 89%

“…Xiaoxiang Gao et al has demonstrated that eigen vibration information of light-absorbing microstructures can be obtained from photoacoustic amplitudes enabling noncontact evaluation of elastic properties [ 19 ]. Noncontact and non-invasive low-cycle fatigue characterization of homogenous, isotropic, elastic cylinders via photoacoustic eigen-spectrum analysis have been shown [ 20 ]. A.B.…”

Section: Introductionmentioning

confidence: 99%

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Laser-Generated Scholte Waves in Floating Microparticles

Ranjan

Ahmad

Ahluwalia

et al. 2023

Sensors

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This study aims to demonstrate the generation and detection of Scholte waves inside polystyrene microparticles. This was proven using both experimental analysis and COMSOL simulation. Microspheres of different sizes were excited optically with a pulsed laser (532 nm), and the acoustic signals were detected using a transducer (40 MHz). On analyzing the laser-generated ultrasound signals, the results obtained experimentally and from COMSOL are in close agreement both in the time and frequency domain. A simplified analysis of Scholte wave generation by laser irradiation for homogeneous, isotropic microspheres is presented. The theoretical wave velocity of the Scholte wave was calculated and found close to our experimental results. A representation of pressure wave motion showing the Scholte wave generation is presented at different times.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Laser-Generated Scholte Waves in Floating Microparticles

Ranjan

Ahmad

Ahluwalia

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…PA imaging has demonstrated great potential in biomedical applications, such as tumor detection, 11) flow measurement, 12) accurate intraoperative margin assessment, 13) etc. [14][15][16][17] The imaging quality of AR-PAM highly depends on the characteristics of the acoustical focus, including focal size and shape. The length and width of the focal region determine the depth of field and the lateral resolution of AR-PAM 18) respectively.…”

mentioning

confidence: 99%

Low-artifact and long depth of field photoacoustic microscopy using a Gaussian-weighted annular array

Liu

Tao

Liu

2019

Appl. Phys. Express

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A Gaussian-weighted annular ultrasound array is proposed to reduce artifacts and extend the depth of field of acoustical-resolution photoacoustic microscopy. By applying Gaussian weighting on each ring, the annular array suppresses the side lobes by about 18 dB compared to a conventional focused transducer, and “X”-shaped artifacts are significantly reduced in the photoacoustic images. Additionally, by controlling the delay time of each ring, the annular array can dynamically focus at different depths, thus achieving a long depth of field. Experiments are performed which demonstrate that the proposed scheme can significantly improve the imaging quality of photoacoustic microscopy.

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Noncontact evaluation of full elastic constants of perovskite MAPbBr3 via Photoacoustic eigen-spectrum analysis in one test

Zhang

Liu

Tao

et al. 2020

Sci Rep

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Elasticity is one basic property of hybrid organic-inorganic perovskites. It highly relates to many fundamental processes in solid physics. The investigation of elasticity is of interest not only to explore the intrinsic properties of a material, but also to improve their potential application performance. In this study, we predict photoacoustic eigen-spectrum (PAES) of single crystal. Then by solving the inverse problem of the generation of PAES, we propose a noncontact method to determine a complete set of elastic constants of single crystal in one test. Experiments confirm the proposed method accurately determines all elastic constants of MAPbBr3. Since this method is totally noncontact and does not require multiple specimens cutting along different crystal axes, it could be more competent for rare, tiny and brittle specimen, or when the specimen is immersed in turbid or opaque medium. Benefitting from these superiorities, the proposed method might be found prominent values in materials science and applications.

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Noninvasive low-cycle fatigue characterization at high depth with photoacoustic eigen-spectrum analysis

Cited by 4 publications

References 49 publications

Laser-Generated Scholte Waves in Floating Microparticles

Laser-Generated Scholte Waves in Floating Microparticles

Low-artifact and long depth of field photoacoustic microscopy using a Gaussian-weighted annular array

Noncontact evaluation of full elastic constants of perovskite MAPbBr3 via Photoacoustic eigen-spectrum analysis in one test

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