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Diffraction of Ultrasonic Waves from Periodic Solid-Gas Rough Surfaces in Electric Contact Weld

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The diffraction of acoustic waves from periodic solid-gas and hybrid surfaces in electric contact weld was modeled based on the Mode Matching Equation (MME) approach, and the stability and accuracy of solution is high and superior to the conventional Boundary Integral Equation (BIE) approach. The model is used to predict the spectrum of diffraction coefficients of periodic silver- gas saw-tooth interface as well as silver-gas mixed with a little part of silver-copper periodic surfaces. The results show that the minima in the spectrum of the reflection coefficient are mainly resulted from the mode conversion when ultrasonic waves impinge on the rough surfaces, but the minima will be weakened for the real weld hybrid profile. Therefore the predictions of the minima in the spectrum will help for improving the accuracy and reliability of ultrasonic testing.
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Document Type: Research Article

Publication date: May 1, 2001

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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