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Interface wave propagation and edge conversion at a low stiffness interphase layer between two solids: A numerical
Hideo Cho1, Stanislav I Rokhlin2
1Aoyama Gakuin University, Department of Science and Engineering, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan.
Ultrasonics
|June 16, 2015
Summary
Energy partitioning in interface waves shifts due to mode interference, causing spectral dips. These dips, observed in Rayleigh waves, offer potential for characterizing bonded solid interfaces.
Area of Science:
- Solid Mechanics
- Materials Science
- Acoustics
Background:
- Understanding wave propagation at solid interfaces is crucial for non-destructive evaluation.
- Rayleigh wave conversion to interface waves presents opportunities for material characterization.
Purpose of the Study:
- To analyze Rayleigh-to-interface wave conversion and the propagation of resulting modes.
- To visualize wave propagation patterns and understand energy partitioning phenomena.
- To investigate the potential of interface wave spectral features for material characterization.
Main Methods:
- Employed a two-dimensional finite difference time domain (FDTD) method for wave propagation analysis.
- Visualized propagated wave patterns to gain insights into energy transfer and interference.
- Analyzed the amplitude spectrum of interface waves and received Rayleigh waves.
Main Results:
- Observed repeated changes in energy partition between symmetric and antisymmetric interface modes due to differing phase velocities.
- Identified destructive interference leading to frequency-shifting dips in the interface wave amplitude spectrum.
- Detected similar interference dips in the spectrum of the received Rayleigh wave, dependent on interface properties.
Conclusions:
- The interference patterns and spectral dips in interface waves provide a basis for characterizing bonded interfaces.
- The conversion factors at corners suggest efficient coupling from Rayleigh to interface waves.
- The study demonstrates the potential for using interface waves to probe material properties.
Keywords:
Bond characterizationFinite difference time domainInterface wave interferenceRayleigh-to-interface wave conversionMore Related Videos
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