Effect of bottom-surface reflections on backscatter from porosity in a composite layer

T. Ohyoshi*, J. D. Achenbach

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

Polar ultrasonic backscatter produced by the bottom surface of a fiber-reinforced composite in cases where the composite is either thin or lacking enough in attenuation-causing features to allow non-negligible wave motion to reach through to this surface is discussed and a method for analyzing and extracting information from the backscatter is described. The constraints and requirements for the analysis are outlined and include an accounting for backscatter resulting from porosity. A single flat pore, characterized as a penny-shaped crack, is initially considered. Then the total effect of a distribution of pores is obtained by integration around the central ray of the incident ultrasonic beam.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Pages1045-1052
Number of pages8
Volume7 B
DOIs
StatePublished - 1988

ASJC Scopus subject areas

  • Engineering(all)

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