Calculation and measurement of scattering coefficients for surface-breaking cracks sonified by a focused array

W. A.K. Deutsch*, A. Cheng, J. D. Achenbach

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A simulation of a focused beam of surface wave motion generated by a line array of surface wave transducers is used to calculate the field scattered back from a surface-breaking crack. The backscattered field is expressed in terms of a scattering coefficient, which is derived from the reciprocal identity for elastodynamic states, and which is calculated numerically by using the Kirchhoff approximation. In an earlier work the validity of the focused beam simulation has been verified. In this paper, the theoretical results for the backscattered field are compared with measurements for two crack sizes, one of which is used for calibration.

Original languageEnglish (US)
Pages (from-to)1-15
Number of pages15
JournalResearch in Nondestructive Evaluation
Volume12
Issue number1
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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