Backscatter from porosity in cross-ply composites

J. Qu; J. D. Achenbach

doi:10.1007/978-1-4613-0979-6_18

Backscatter from porosity in cross-ply composites

J. Qu^*, J. D. Achenbach

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter

4 Scopus citations

Abstract

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 language	English (US)
Title of host publication	Review of Progress in Quantitative Nondestructive Evaluation
Pages	1029-1036
Number of pages	8
Volume	7 B
DOIs	https://doi.org/10.1007/978-1-4613-0979-6_18
State	Published - 1988

ASJC Scopus subject areas

General Engineering

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10.1007/978-1-4613-0979-6_18

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AB - 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.

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ER -

Backscatter from porosity in cross-ply composites

Abstract

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