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Experimental characterization of a defect separating two poroelastic plates
Mehdi Mohammed1, Pierre Maréchal1, Abdellah Alem1
1Laboratoire Ondes et Milieux Complexes (LOMC) UMR CNRS 6294, 75 rue Bellot, Université Le Havre Normandie, Le Havre, France.
Ultrasonics
|October 19, 2025
Summary
This study shows acoustic waves can detect material erosion in porous media. By analyzing wave behavior with varying fluid layer thickness, researchers can quantify degradation.
Area of Science:
- Engineering and Material Science
- Acoustics
- Geophysics
Background:
- Erosion detection is critical for structural integrity and performance.
- Progressive material degradation can lead to significant stability issues.
- Understanding material behavior in porous media is essential for various applications.
Purpose of the Study:
- To investigate the use of acoustic waves for detecting and characterizing material degradation.
- To analyze how variations in fluid layer thickness affect acoustic wave propagation in porous systems.
- To establish a method for evaluating erosion based on acoustic wave analysis.
Main Methods:
- Theoretical modeling using Biot's theory for porous media.
- Experimental measurements of acoustic wave reflection coefficients.
- Systematic variation of fluid layer thickness (0-11 mm) and frequency analysis.
Main Results:
- Acoustic wave behavior is demonstrably altered by changes in fluid layer distance.
- Experimental results show good agreement with theoretical predictions based on Biot's theory.
- Minor divergences between theory and experiment suggest the complexity of porous media.
Conclusions:
- Acoustic wave analysis is a viable method for detecting material degradation in porous media.
- Fluid layer thickness variations provide quantifiable insights into acoustic wave propagation.
- This research offers a novel approach to evaluating erosion levels through layer spacing analysis.
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