Boundary element modeling for guided wave reflection and transmission factor analyses in defect classification

Joseph Lawrence Rose, Wenhao Zhu, Younho Cho

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

The guided wave scattering process by different defects in plate structures is studied with a boundary element method. The purpose is to separate sharp crack-like defects from smooth volumetric-like ones by analyzing the transmission and reflection factors. The traditional normal mode expansion technique has been combined with the boundary element discretization to form a hybrid BEM scheme. With this method, the scattered near-fields and the transmission and reflection coefficients of the far-fields on individual modes can be obtained simultaneously. Several features related to the Lamb mode reflection and transmission process in a plate with these defect types are extracted and compared. The theoretical analysis provides a guideline for data acquisition and feature selection for use in the decision algorithm development program via neural nets.

Original languageEnglish (US)
Pages (from-to)885-888
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume1
StatePublished - Dec 1 1998
EventProceedings of the 1998 International Ultrasonics Symposium - Sendai, Miyagi, Jpn
Duration: Oct 5 1998Oct 8 1998

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wave reflection
defects
neural nets
boundary element method
wave scattering
data acquisition
far fields
near fields
cracks
reflectance
expansion
coefficients

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

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abstract = "The guided wave scattering process by different defects in plate structures is studied with a boundary element method. The purpose is to separate sharp crack-like defects from smooth volumetric-like ones by analyzing the transmission and reflection factors. The traditional normal mode expansion technique has been combined with the boundary element discretization to form a hybrid BEM scheme. With this method, the scattered near-fields and the transmission and reflection coefficients of the far-fields on individual modes can be obtained simultaneously. Several features related to the Lamb mode reflection and transmission process in a plate with these defect types are extracted and compared. The theoretical analysis provides a guideline for data acquisition and feature selection for use in the decision algorithm development program via neural nets.",
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Boundary element modeling for guided wave reflection and transmission factor analyses in defect classification. / Rose, Joseph Lawrence; Zhu, Wenhao; Cho, Younho.

In: Proceedings of the IEEE Ultrasonics Symposium, Vol. 1, 01.12.1998, p. 885-888.

Research output: Contribution to journalConference article

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