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Lamb wave scattering analysis for reflector characterization.

Y Cho1, D D Hongerholt, J L Rose

  • 1Dept. of Mech. Eng., Inje Univ., Kyungnahm.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1997
PubMed
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This study explores using guided waves for defect characterization. Results show that analyzing wave transmission and reflection coefficients can identify defect size and shape.

Area of Science:

  • Non-destructive testing
  • Wave propagation phenomena

Background:

  • Guided waves offer potential for non-destructive evaluation.
  • Understanding defect influence on wave fields is crucial for characterization.

Purpose of the Study:

  • To investigate guided wave behavior for defect characterization.
  • To analyze the impact of defect geometry (shape, size) on wave propagation.

Main Methods:

  • Numerical simulation using the hybrid boundary element technique.
  • Calculation of reflection and transmission coefficients for guided wave modes.
  • Comparison of numerical results with experimental data.

Main Results:

  • Defect shape and size significantly alter transmitted and reflected guided wave fields.

Related Experiment Videos

  • Transmission and reflection coefficients vary with defect aspect ratio and depth.
  • Numerical predictions align well with experimental observations.

    • Conclusions:

    • Guided wave analysis is a viable method for defect characterization.
    • Establishing mode selection criteria is key for accurate defect identification.
    • Wave coefficient data can inform defect characterization algorithm development.