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.
S. Kharkovsky et al., "Near-Field Millimeter-Wave Imaging of Exposed and Covered Fatigue Cracks," IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 7, pp. 2367-2370, Institute of Electrical and Electronics Engineers (IEEE), Jul 2009.
The definitive version is available at http://dx.doi.org/10.1109/TIM.2009.2022380
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; Millimeter waves; Reflectometer
International Standard Serial Number (ISSN)
Article - Journal
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