Reflection at a liquid-solid interface of a transient ultrasonic field radiated by a linear phased array transducer

Area of Science:

• Acoustics
• Materials Science
• Wave Propagation

Background:

• Understanding wave reflection is crucial in non-destructive testing and material characterization.
• Transient ultrasonic wave analysis provides detailed insights into material interfaces.

Purpose of the Study:

• To model and visualize specular and non-specular reflections of transient ultrasonic waves.
• To analyze various wave components generated at a liquid-solid interface.

Main Methods:

• Extension of the angular spectrum method to transient ultrasonic wave analysis.
• Utilizing reflection coefficients for harmonic plane waves to model interface interactions.
• Employing a ray model for analyzing transient wave representations.

Main Results:

• Successfully visualized direct waves, edge waves, and longitudinal head waves (leaky Rayleigh waves).
• Instantaneous wave cartographies clearly depicted wave behavior at the liquid-solid interface.
• Model results showed good agreement when compared to finite element method simulations.

Conclusions:

• The extended angular spectrum method effectively models transient ultrasonic wave reflections.
• The study provides a clear description of different wave components at interfaces.
• This method offers a valuable tool for analyzing complex ultrasonic wave phenomena.