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Lamb Wave Based Structural Damage Detection Using Stationarity Tests.

Phong B Dao1,2, Wieslaw J Staszewski1

  • 1Department of Robotics and Mechatronics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland.

Materials (Basel, Switzerland)
|November 27, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel stationarity-based approach for structural damage detection using Lamb waves. By analyzing the statistical stationarity of wave data, the method simplifies damage assessment in aluminium plates, outperforming complex mode analysis.

Keywords:
Lamb wavesintegrated piezoceramic transducersstationarity and nonstationaritystationarity teststructural health monitoringtemperature variationsunit root test

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Signal Processing

Background:

  • Lamb wave propagation analysis is complex, limiting practical structural damage detection.
  • Existing methods struggle with the intricate nature of Lamb wave modes.

Purpose of the Study:

  • To propose a simplified, efficient structural damage detection method using Lamb waves.
  • To investigate the statistical stationarity of Lamb waves for health monitoring.
  • To validate the approach on aluminium plates under varying temperatures.

Main Methods:

  • Statistical analysis of Lamb wave signal stationarity.
  • Application of four unit root tests: Augmented Dickey-Fuller (ADF), Kwiatkowski-Phillips-Schmidt-Shin (KPSS), Phillips-Perron (PP), and Leybourne-McCabe (LM).
  • Damage detection based on the separation of t-statistic features from unit root tests.

Main Results:

  • ADF and KPSS tests effectively detected damage in aluminium plates.
  • PP and LM tests showed limited significance for damage identification.
  • ADF demonstrated better temperature stability, while KPSS offered superior damage detection capability.
  • Both ADF and KPSS reliably detected damage below 60 °C, with increased fluctuation above 65 °C.

Conclusions:

  • A stationarity-based approach offers a simple and efficient alternative for Lamb wave structural health monitoring.
  • Combining ADF and KPSS tests enhances damage detection reliability, especially under temperature variations.
  • The method has potential applications in industrial condition monitoring and fault diagnosis.