Lamb wave scattering analysis for reflector characterization

Younho Cho, Derrick D. Hongcrholt, Joseph L. Rose

Research output: Contribution to journalArticle

90 Scopus citations

Abstract

The potential use of guided waves for defect characterization is studied. The influence of defect shape and size on transmitted and reflected fields is considered. Using the hybrid boundary element technique, the reflection and transmission coefficients for selected guided wave modes are numerically calculated and compared to experimental data. Selecting the aspect ratio as a shape parameter for various defects, the transmission and reflection coefficients are measured for certain guided wave modes input to the defect. The influence of defect size is then studied by monitoring the transmission and reflection coefficients for defects of various shapes and depths. The studies presented indicate that defect characterization is possible if a proper mode selection criteria can be established. The suitable features related to transmission and reflection coefficient data can also be used for algorithm development and implementation purposes of defect characterization.

Original languageEnglish (US)
Pages (from-to)44-52
Number of pages9
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Volume44
Issue number1
DOIs
StatePublished - Dec 1 1997

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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