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Related Experiment Videos

Bounded beam interaction with thin inclusions. Characterization by phase differences at Rayleigh angle incidence.

R Briers1, O Leroy, G Shkerdin

  • 1Interdisciplinary Research Center, Kortrijk, Belgium. Rudy.Briers@kulak.ac.be

The Journal of the Acoustical Society of America
|October 29, 2000
PubMed
Summary

This study shows that ultrasonic phase shifts during reflection from thin rectangular inclusions can precisely characterize their dimensions. This method is valuable for non-destructive testing and material analysis.

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Area of Science:

  • Acoustics
  • Solid Mechanics
  • Materials Science

Background:

  • Ultrasonic testing is crucial for non-destructive evaluation of materials.
  • Characterizing subsurface defects like inclusions is challenging.
  • Understanding wave reflection from interfaces is key to defect detection.

Purpose of the Study:

  • To theoretically investigate the reflection of bounded Gaussian ultrasonic beams from thin rectangular inclusions near a fluid/solid interface.
  • To determine if ultrasonic reflection characteristics can be used for precise inclusion dimension characterization.
  • To explore the sensitivity of reflected wave properties to inclusion geometry.

Main Methods:

  • Utilizing a theoretical model based on mode theory.
  • Analyzing the reflection of a bounded Gaussian ultrasonic beam.

Related Experiment Videos

  • Focusing on incidence at the critical Rayleigh angle.
  • Examining the phase of the shifted reflected lobe at maximum amplitude.

    • Main Results:

    • The phase of the reflected ultrasonic beam's shifted lobe is highly sensitive to inclusion dimension variations.
    • This sensitivity is particularly pronounced at critical Rayleigh angle incidence.
    • The inclusion's thickness is assumed to be significantly smaller than the ultrasonic wavelength.

    Conclusions:

    • The phase sensitivity offers a viable method for accurate characterization of thin rectangular inclusions.
    • This finding has potential applications in advanced non-destructive testing and material science.
    • Mode theory provides a robust framework for modeling such ultrasonic interactions.