Backscatter from porosity in cross-ply composites

J. Qu*, J. D. Achenbach

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations


The theoretical model established by the authors in an earlier paper to analyze the ultrasonic backscatter from a porous unidirectional fiber-reinforced composite was extended in this paper to apply to multi-ply fiber-reinforced composites. The model describes the characteristically anisotropic features of polar backscatter by taking into account the directional inhomogeneity of the composite against an anisotropic but homogeneous background. If the composite contains porosity at the ply interfaces an added backscattering component is introduced. The model is tested on a composite plate submerged in water. The wavelength was assumed to be sufficiently larger than the ply thickness to eliminate scattering by individual fibers.

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

ASJC Scopus subject areas

  • Engineering(all)


Dive into the research topics of 'Backscatter from porosity in cross-ply composites'. Together they form a unique fingerprint.

Cite this