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Numerical predictions and experiments on the free-plate edge mode
Emmanuel Le Clezio1, Mihai Valentin Predoi, Michel Castaings
1Laboratoire de Mécanique Physique, Université Bordeaux 1, UMR CNRS 5469 351, Cours de la Libération, 33405 Talence Cedex, France. e.leclezio@lmp.u-bordeaux.fr
Ultrasonics
|December 5, 2002
Summary
This study investigates edge mode variations using three numerical methods and laser measurements. Researchers achieved a full understanding of edge resonance, linking it to Lamb waves radiating as the S(0) mode.
Area of Science:
- Acoustics
- Solid Mechanics
- Wave Propagation
Background:
- Edge modes and edge resonance are critical phenomena in wave propagation within structures.
- Understanding these phenomena is essential for predicting structural behavior and failure.
Purpose of the Study:
- To investigate edge mode variations using multiple numerical and experimental techniques.
- To achieve a comprehensive understanding of the edge resonance phenomenon.
- To analyze the radiation of edge modes into the plate and their dependence on material properties.
Main Methods:
- Reciprocal work method
- S-parameter method
- Finite element modeling
- Laser probe measurements
Main Results:
- Good agreement between numerical predictions and experimental data.
- Edge resonance is linked to the amplitude increase of two complex Lamb waves.
- The edge mode radiates into the plate as the first symmetrical Lamb mode S(0).
- Spatial and temporal behavior of the edge mode was evaluated.
- Dependence of resonance frequency and amplitude on the Poisson coefficient was studied.
Conclusions:
- The study provides a full understanding of the edge resonance phenomenon.
- The findings clarify the relationship between edge modes, Lamb waves, and radiation into the plate.
- The research offers insights into the influence of material properties on edge resonance behavior.