Ellipsometry of surface acoustic waves using 3D vibrometry for viscoelastic material characterization by the estimation of complex Lamé coefficients versus the frequency

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2024-09-27 DOI:10.1016/j.apacoust.2024.110312

Aziz Bouzzit, Loïc Martinez, Andres Arciniegas, Stéphane Serfaty, Nicolas Wilkie-Chancellier

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引用次数: 0

Abstract

Surface acoustic waves (SAW) are adequate regarding material characterization because they have low geometric attenuation compared to bulk waves. SAW can be generated easily by normal excitation using contact transducers or power lasers and have also a unique elliptic polarization, characterized by two parameters: the ellipticity (H/V) ratio between the horizontal and the vertical components of the elliptic motions and the orientation angle (

θ

) between the horizontal axis of the ellipse and the surface. In the case of a viscoelastic isotropic material, a complete characterization is achieved by the association of the quantitative measurement of the polarization and the propagative characteristics, the complex wavenumber, of the SAW. In practice, this operation is performed using 3D lased vibrometry for propagation monitoring in space and time. The post-processing is carried out by Quaternion Fourier Transform, the Prony algorithm and the complex Lamé coefficients identification for the theoretical model of propagation on the material. Good agreement is observed between the obtained results and the ones of the pulse-echo method.

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利用三维振动测量法对表面声波进行椭偏测量，通过估算复拉美系数与频率的关系来确定粘弹性材料的特性

与体波相比，声表面波（SAW）的几何衰减较低，因此非常适合材料表征。声表面波可以通过使用接触式传感器或功率激光器进行法向激励而轻松产生，并且具有独特的椭圆极化特性，该特性由两个参数决定：椭圆运动的水平分量和垂直分量之间的椭圆度 (H/V) 比值，以及椭圆水平轴与表面之间的定向角 (θ)。在粘弹性各向同性材料的情况下，通过对偏振和声表面波的传播特性（复波长）进行定量测量，可实现完整的特征描述。在实践中，这一操作是通过三维激光测振仪进行的，用于在空间和时间上进行传播监测。后处理是通过四元数傅里叶变换、Prony 算法和复拉美系数识别对材料传播的理论模型进行的。所得结果与脉冲回波法的结果一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.