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Propagation of Waves

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Related Experiment Video

Updated: Jul 11, 2025

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

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Guided wave propagation in a double-layer plate with a nonlinear spring-interface.

Junzhen Wang¹, Jianmin Qu¹

¹Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA.

|November 17, 2023

Summary

This summary is machine-generated.

Nonlinear spring interfaces in double-layer plates can generate resonant guided waves. This phenomenon, mixing primary waves, offers potential for nondestructive evaluation of material bonds.

Keywords:

Nondestructive evaluation Nonlinear guided waves Normal mode expansion Second harmonic generation Wave mixing

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Last Updated: Jul 11, 2025

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Published on: August 7, 2018

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Area of Science:

Solid Mechanics
Wave Propagation
Materials Science

Background:

Guided waves in layered structures are crucial for structural health monitoring.
Interface properties significantly influence wave behavior.
Nonlinear effects in materials can lead to unique wave phenomena.

Purpose of the Study:

To theoretically investigate guided wave propagation in a double-layer plate with a nonlinear interface.
To explore the generation of resonant guided waves due to interface nonlinearity.
To establish a foundation for nonlinear guided wave-based nondestructive evaluation.

Main Methods:

Development of a nonlinear spring-interface model for the double-layer plate.
Application of the modified normal mode expansion method to solve for guided wave fields.
Analysis of wave mixing and resonance conditions.

Main Results:

Nonlinearity at the interface generates resonant guided waves.
Wave mixing produces resonant waves with summed or differenced frequencies.
Resonant wave amplitudes correlate with interface compliance.
Second harmonic generation is possible for primary waves of equal frequency.

Conclusions:

The nonlinear spring-interface model accurately predicts resonant guided wave generation.
Understanding these nonlinear phenomena is key for developing advanced nondestructive evaluation techniques.
This research provides theoretical support for assessing bond integrity in layered materials.