Degree Type

Thesis

Date of Award

1989

Degree Name

Master of Science

Department

Aerospace Engineering

Abstract

Ultrasonic nondestructive evaluation can be used to quantitatively interpret received electrical signals from ultrasonic measurements. In order to preform this interpretation, several techniques have been used. Two of these techniques are the standard procedure and the measurement model. The standard procedure compares the waves reflected from the flawed specimen with the waves reflected from many specimens of the same host material with different known flaws in the interior. By matching reflections, the approximate size of the flaw can be estimated by comparison with the response from the known standard flaw model; however, this method requires a large number of known, standard flaw models, which makes it a difficult procedure to use. In addition, different flaw shapes of different sizes can result in the same overall peak-to-peak response. Therefore, precise flaw sizing can not be obtained with this technique.

DOI

https://doi.org/10.31274/rtd-180813-5526

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu

Copyright Owner

Mary A. Paul

Language

en

Date Available

2013-12-12

File Format

application/pdf

File Size

262 pages

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