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Temperature Effects on Nonlinear Ultrasonic Guided Waves.

Xiaochuan Niu1,2, Liqiang Zhu1,2,3, Wenlin Yang1

  • 1School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China.

Materials (Basel, Switzerland)
|May 13, 2023
PubMed
Summary
This summary is machine-generated.

Temperature significantly impacts nonlinear ultrasonic guided waves used in structural health monitoring. Understanding and compensating for these temperature effects is crucial for accurate damage detection and structural integrity assessment.

Keywords:
cumulative second harmonicsnonlinear ultrasonic guided wavesresponse lawsemi-analytical finite elementtemperature

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Acoustics

Background:

  • Nonlinear ultrasonic guided waves offer high sensitivity and long detection distances for structural health monitoring.
  • Temperature variations in structures can affect the performance of these monitoring systems.

Purpose of the Study:

  • To investigate and quantify the influence of temperature on nonlinear ultrasonic guided waves.
  • To develop an analytical method for predicting temperature-dependent wave behavior.

Main Methods:

  • An analytical approach based on the semi-analytical finite element (SAFE) method was employed.
  • Simulations and experimental tests were conducted on a plate structure.

Main Results:

  • Distinct temperature variation trends were observed for different cumulative second harmonic modes.
  • Wave amplitudes showed monotonic increases or decreases with rising temperatures.

Conclusions:

  • Temperature significantly influences nonlinear ultrasonic guided waves, necessitating compensation for accurate structural health monitoring.
  • The proposed analytical method and findings are applicable to various structures.