DC Field | Value | Language |
---|---|---|
dc.contributor.author | Flynn, Eric B. | ko |
dc.contributor.author | Chong, See Yenn | ko |
dc.contributor.author | Jarmer, Gregory J. | ko |
dc.contributor.author | Lee, Jung-Ryul | ko |
dc.date.accessioned | 2016-04-05T16:21:58Z | - |
dc.date.available | 2016-04-05T16:21:58Z | - |
dc.date.created | 2015-01-20 | - |
dc.date.created | 2015-01-20 | - |
dc.date.created | 2015-01-20 | - |
dc.date.issued | 2013-10 | - |
dc.identifier.citation | NDT & E INTERNATIONAL, v.59, pp.1 - 10 | - |
dc.identifier.issn | 0963-8695 | - |
dc.identifier.uri | http://hdl.handle.net/10203/202816 | - |
dc.description.abstract | This paper describes a method to effectively image structural features and defects using local estimates of the wavenumber of propagating guided Lamb waves at a fine grid of spatial sampling points. The guided waves are rapidly excited at each grid point using a scanning Q-switched laser system and sensed by a single fixed ultrasonic transducer. Through reciprocity, this produces a full-wave-field time history of a virtual wave being excited from the transducer. Using frequency wavenumber processing, localized wavelength estimates are obtained by isolating each wave mode, narrowband filtering to one or more high-energy frequency bands, and identifying the center-wavelength of a sliding wavenumber band-pass filter that maximizes the energy at each grid point. The approach was capable of producing detailed images of hidden wall-thinning in an aluminum plate and a steel pipe section and local impact delamination in a complicated composite component. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.subject | SCANNING LASER VIBROMETRY | - |
dc.subject | VISUALIZATION | - |
dc.subject | ULTRASOUND | - |
dc.title | Structural imaging through local wavenumber estimation of guided waves | - |
dc.type | Article | - |
dc.identifier.wosid | 000323297900001 | - |
dc.identifier.scopusid | 2-s2.0-84878349284 | - |
dc.type.rims | ART | - |
dc.citation.volume | 59 | - |
dc.citation.beginningpage | 1 | - |
dc.citation.endingpage | 10 | - |
dc.citation.publicationname | NDT & E INTERNATIONAL | - |
dc.identifier.doi | 10.1016/j.ndteint.2013.04.003 | - |
dc.contributor.localauthor | Lee, Jung-Ryul | - |
dc.contributor.nonIdAuthor | Flynn, Eric B. | - |
dc.contributor.nonIdAuthor | Chong, See Yenn | - |
dc.contributor.nonIdAuthor | Jarmer, Gregory J. | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Nondestructive testing | - |
dc.subject.keywordAuthor | Ultrasonic guided waves | - |
dc.subject.keywordAuthor | Laser-generated ultrasound | - |
dc.subject.keywordAuthor | Image processing | - |
dc.subject.keywordPlus | SCANNING LASER VIBROMETRY | - |
dc.subject.keywordPlus | VISUALIZATION | - |
dc.subject.keywordPlus | ULTRASOUND | - |
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