Estimation of Surface Crack Depth using Rayleigh Waves by Electromagnetic Acoustic Transducers

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2017-12-01 DOI:10.20855/IJAV.2017.22.4501

C. He, Peng Deng, Yan Lu, Xiucheng Liu, Zenghua Liu, J. Jiao, Bin Wu

引用次数: 18

Abstract

A quantitative characterization method is introduced for estimating surface crack depth using Rayleigh waves in pitch-catch mode by electromagnetic acoustic transducers (EMATs). The method employs the experimentally determined reflection and transmission coefficients of Rayleigh waves scattered at a surface crack, which will be compared to the reference curves obtained from two-dimensional finite element method (FEM) simulations based on variable crack depth. Three EMAT couples with different centre frequencies were employed to extend the measuring range, and to implement the quantitative characterization of crack depth. The reference curves and measurement results were verified to be repeatable with great accuracy, which shows a maximum error of 17% with crack depth ranging from 0.2–3.0 mm.

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电磁声换能器利用瑞利波估算表面裂纹深度

介绍了一种利用电磁声换能器（EMAT）在俯仰捕获模式下利用瑞利波估算表面裂纹深度的定量表征方法。该方法采用了实验确定的表面裂纹散射瑞利波的反射和透射系数，并将其与基于可变裂纹深度的二维有限元模拟获得的参考曲线进行比较。采用三个具有不同中心频率的EMAT耦合来扩展测量范围，并实现裂纹深度的定量表征。验证了参考曲线和测量结果的可重复性和高精度，显示裂纹深度在0.2–3.0 mm范围内的最大误差为17%。

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

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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