Abstract

In this paper, the efficacy of near-field millimeter-wave nondestructive techniques, using open-ended flange-mounted rectangular waveguide probes, for extracting information of 3-D crack area deformation (i.e., in-plane and out-of-plane deformation) is demonstrated. It is shown that this information can be obtained from indications of unique interference patterns that are generated between the probe and the metal surface during the raster scan of a surface-breaking exposed and covered fatigue crack using a phase-sensitive reflectometer.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Crack; Imaging; Interference pattern; Near field; Nondestructive; Reflectometer; Extracting information; In-plane; Metal surfaces; Millimeter-wave imaging; Out-of-plane; Phase-sensitive; Raster scans; Deformation; Fatigue crack propagation; Fatigue of materials

Library of Congress Subject Headings

Millimeter waves
Reflectometer

International Standard Serial Number (ISSN)

189456

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2009 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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