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Spatial ultrasonic wavefront characterization using a laser parametric curve scanning method.

See Yenn Chong1, Michael D Todd1

  • 1Department of Structural Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, CA 92093-0085, USA.

Ultrasonics
|September 20, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a novel parametric curve laser scanning method for ultrasonic wavefield imaging. This technique accurately characterizes ultrasonic wavefronts in materials, advancing nondestructive evaluation and structural health monitoring.

Keywords:
Laser parametric curve scanningLaser ultrasonic techniquesSpatial ultrasonic wavefront patternUltrasonic wavefield imagingUltrasonic wavefront characterization

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Area of Science:

  • Materials Science
  • Wave Propagation Physics
  • Non-destructive Testing

Background:

  • Ultrasonic wavefield imaging (UWI) is crucial for nondestructive evaluation (NDE) and structural health monitoring (SHM).
  • Ultrasonic wavefronts exhibit unique propagation patterns representable by parametric curves.
  • Characterizing these wavefronts is essential for accurate material analysis.

Purpose of the Study:

  • To propose and validate a spatial ultrasonic wavefront characterization method using parametric curve laser scanning.
  • To assess the method's efficacy on both isotropic (aluminum) and anisotropic (CFRP) materials.
  • To explore the potential of this method for advancing NDE-SHM applications.

Main Methods:

  • Utilized ultrasonic wavefield imaging (UWI) to determine parametric equations of wavefronts.
  • Employed a laser ultrasonic interrogation system (LUIS) for ultrasound measurement and updating.
  • Applied temporal cross-correlation techniques to quantify parametric curve values.
  • Tested on aluminum and cross-ply CFRP plates, considering different material regions.

Main Results:

  • Successfully characterized spatial incident and reflected wavefronts in aluminum and CFRP plates.
  • Demonstrated the capability of laser circle and cyclic-harmonic scans for S0 and A0 mode wavefronts.
  • The laser hyperbolic curve scan also provided valuable characterization data.
  • The method showed promise in analyzing both isotropic and anisotropic material responses.

Conclusions:

  • The proposed parametric curve laser scanning method offers a new approach for ultrasonic wavefront characterization.
  • Integration with LUIS can enhance damage detection capabilities in NDE-SHM.
  • Provides valuable insights for the design and improvement of ultrasonic algorithms.