Location

La Jolla, CA

Start Date

1-1-1987 12:00 AM

Description

Recently, the frequency dependent ultrasonic attenuation has been used to find the volume fraction and pore size of gas porosity in cast aluminum alloys [1,2]. The question arises as to whether these techniques can be adapted for the characterization of porosity in layered materials, such as graphite-epoxy composites. One major difference lies in the morphology of the pores: they are nearly spherical in the aluminum alloys whereas they are long, parallel and needle-like in graphite-epoxy [3]. Consequently, it is of considerable interest to adapt the techniques developed for porosity estimation in [1] for the study of a collection of needle-like pores which we model as cylindrical voids.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

6B

Chapter

Chapter 6: Advanced Composites

Section

Defects

Pages

1165-1174

DOI

10.1007/978-1-4613-1893-4_133

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Ultrasonic Characterization of Cylindrical Porosity — A Model Study

La Jolla, CA

Recently, the frequency dependent ultrasonic attenuation has been used to find the volume fraction and pore size of gas porosity in cast aluminum alloys [1,2]. The question arises as to whether these techniques can be adapted for the characterization of porosity in layered materials, such as graphite-epoxy composites. One major difference lies in the morphology of the pores: they are nearly spherical in the aluminum alloys whereas they are long, parallel and needle-like in graphite-epoxy [3]. Consequently, it is of considerable interest to adapt the techniques developed for porosity estimation in [1] for the study of a collection of needle-like pores which we model as cylindrical voids.