Nonlinear Lamb Waves for the Detection of Localized Defects Using the Cumulative Second and Third Harmonics: Experimental Study

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
S. Taleb, S. Gachi, F. Boubenider
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引用次数: 0

Abstract

Recent studies have proved the usability of the nonlinear S0 lamb mode without satisfying the phase velocity matching criteria, and the possibility to extend its application to varying thickness plates. Based on that, this work proposes an experimental study of the inspection of macro scale localized defects with a size smaller than the used wavelength, via the second and third harmonics generation. Results were obtained on verifying their cumulative effect with varying the defect’s width and also on finding that the third harmonic is better suited for larger scale inspection using the nonlinear lamb waves, and identifying the propagating modes in the plates using the wavelet transform.

Abstract Image

利用累积二次和三次谐波检测局部缺陷的非线性λ波:实验研究
最近的研究证明了非线性 S0 lamb 模式在不满足相位速度匹配标准的情况下的可用性,以及将其应用扩展到不同厚度板材的可能性。在此基础上,这项工作提出了通过二次和三次谐波产生来检测尺寸小于所用波长的宏观局部缺陷的实验研究。研究结果验证了随着缺陷宽度的变化,二次谐波和三次谐波的累积效应,同时还发现三次谐波更适合于使用非线性λ波进行更大规模的检测,以及使用小波变换识别板材中的传播模式。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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