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Proceedings Paper

Three-dimensional ultrasonic imaging: an aging aircraft nondestructive inspection tool
Author(s): Graham H. Thomas; Steve Benson; Susan Crawford
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Paper Abstract

Ultrasonic nondestructive evaluation is a valuable technique for finding defects in aircraft structures. It can detect unbonds, corrosion damage, and cracks in various aircraft components. Ultrasonic nondestructive evaluation techniques interrogate materials with high frequency acoustic energy. A piezoelectric transducer generates acoustic energy and converts returned acoustic energy into electrical signals which can be processed to identify the reflector. The acoustic energy propagates through the component and is reflected by abrupt changes in modulus and/or density that can be caused by a defect. Ultrasonic nondestructive evaluation typically provides a two dimensional image of internal defects. These images are either a planar view (C-scan) or a cross-sectional view (B-scan) of the component. The planar view is generated by raster scanning an ultrasonic transducer over the area of interest and capturing the peak amplitude of internal reflections. Depth information is generally ignored.

Paper Details

Date Published: 3 December 1993
PDF: 8 pages
Proc. SPIE 2001, Nondestructive Inspection of Aging Aircraft, (3 December 1993); doi: 10.1117/12.163855
Show Author Affiliations
Graham H. Thomas, Lawrence Livermore National Lab. (United States)
Steve Benson, Lawrence Livermore National Lab. (United States)
Susan Crawford, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 2001:
Nondestructive Inspection of Aging Aircraft
Michael T. Valley; Nancy K. Del Grande; Albert S. Kobayashi, Editor(s)

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