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Stoneley waves in three-layered cylindrical solid media.
Hanyin Cui1, Jon Trevelyan, Sherri Johnstone
1School of Engineering and Computing Sciences, Durham University, Durham DH1 3LE, United Kingdom. hanyin.cui@durham.ac.uk
The Journal of the Acoustical Society of America
|July 27, 2011
Summary
This study analyzes Stoneley modes in layered cylindrical media for ultrasonic rod design. Peak amplitude locations shift between interfaces with frequency, aiding efficient model development.
Area of Science:
- Solid mechanics
- Acoustics
- Materials science
Background:
- Understanding wave propagation in layered media is crucial for designing advanced acoustic devices.
- Stoneley waves are interface-confined acoustic waves with applications in non-destructive testing and material characterization.
Purpose of the Study:
- To investigate the propagation characteristics of Stoneley modes in three-layered concentric cylindrical solid media.
- To provide insights for the design and optimization of ultrasonic transmission rods.
Main Methods:
- Numerical analysis of phase velocity dispersion curves.
- Numerical analysis of amplitude distributions of Stoneley modes.
- Development of a simplified model for predicting peak amplitude locations.
Main Results:
- Stoneley modes exhibit high-frequency confinement near the two interfaces.
- A key finding is the frequency-dependent transfer of peak amplitude locations between interfaces.
- The simplified model efficiently predicts peak amplitude locations across different frequency ranges.
Conclusions:
- The frequency-dependent behavior of Stoneley modes in layered cylindrical structures is significant for ultrasonic rod design.
- The developed simplified model offers an efficient tool for analyzing and predicting wave localization in such systems.
- This research contributes to the advancement of acoustic wave manipulation in complex layered materials.
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