Numerical Study on Signal Enhancement of the Rayleigh Wave in the Near-Field of Surface Defects

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概要

• 論文の詳細を見る

• The near-field scattering of laser generated Rayleigh waves from surface slot, which serves as artificial defects, has been studied using finite element method. Distinct signal enhancements of in- and out-of-plane displacement waveforms are observed in the near field of the surface slot, which enhance the detectability of the surface defect. Furthermore, the four interference phonomina in the displacement signals of surface acoustic waves have been captured and analyzed by considering the acoustic reflections and mode conversion happened at the defect. The results illustrate the physical mechanism which is responsible for the signal enhancement in the near field and the oscillations of signal enhancement factors for two directions as a function of the separation of the observation point and the defect tip.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2010-06-25

著者

• Jianfei Guan

  College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, P. R. China

• Guan Jianfei

  College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, P. R. China

関連論文

• Numerical Study on Depth Gauging of Surface Breaking Defects Using Laser-Generated Surface Acoustic Waves
• Numerical Study on Signal Enhancement of the Rayleigh Wave in the Near-Field of Surface Defects

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