Off-epicentral measurement of laser-ultrasonic shear-wave velocity and its application to elastic-moduli evaluation

Bai, Xue; Ma, Jing; Xu, Wanwei; Wang, Jilai; Liu, Shuai

doi:10.1016/j.ultras.2022.106850

Cited by 6 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This excitation method enables non-destructive and non-contact measurements with a broad frequency spectrum and high amplitude signals [ 13 , 14 ]. This excitation technique for short ultrasonic pulses is used for the excitation of longitudinal [ 15 , 16 , 17 ], shear [ 18 , 19 , 20 ], Rayleigh [ 21 , 22 , 23 , 24 , 25 ], and lamb waves [ 26 , 27 , 28 , 29 ]. All studies require high-quality experimental data and a deep understanding of the limitations of the experiment and the analysis.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Resolved High-Frequency Broadband Measurement of Acoustic Longitudinal Waves by Laser-Based Excitation and Detection

Brand,

Drese

2024

Sensors

View full text Add to dashboard Cite

Optoacoustics is a metrology widely used for material characterisation. In this study, a measurement setup for the selective determination of the frequency-resolved phase velocities and attenuations of longitudinal waves over a wide frequency range (3– 55MHz) is presented. The ultrasonic waves in this setup were excited by a pulsed laser within an absorption layer in the thermoelastic regime and directed through a layer of water onto a sample. The acoustic waves were detected using a self-built adaptive interferometer with a photorefractive crystal. The instrument transmits compression waves only, is low-contact, non-destructive, and has a sample-independent excitation. The limitations of the approach were studied both by simulation and experiments to determine how the frequency range and precision can be improved. It was shown that measurements are possible for all investigated materials (silicon, silicone, aluminium, and water) and that the relative error for the phase velocity is less than 0.2 .

show abstract