Toward a Viable Strategy for Estimating Vibrothermographic Probability of Detection

dc.contributor.author Holland, Stephen
dc.contributor.author Uhl, Christopher
dc.contributor.author Renshaw, Jeremy
dc.contributor.department Aerospace Engineering
dc.date 2018-02-13T03:16:46.000
dc.date.accessioned 2020-06-29T22:45:09Z
dc.date.available 2020-06-29T22:45:09Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.embargo 2012-11-20
dc.date.issued 2007-07-01
dc.description.abstract <p>Vibrothermography is a technique for finding cracks and delaminations through infrared imaging of vibration‐induced heating. While vibrothermography has shown remarkable promise, it has been plagued by persistent questions about its reproducibility and reliability. Fundamentally, the crack heating is caused by the vibration, and therefore to understand the heating process we must first understand the vibration process. We lay out the problem and begin the first steps toward relating detectability to the local motion around a crack as well as the crack size. A particular mode, the third‐order free‐free flexural resonance, turns out to be particularly insensitive to the presence of clamping and transducer contact. When this mode is excited in a simple bar geometry the motions of the part follow theoretical calculations quite closely, and a single point laser vibrometer measurement is sufficient to evaluate the motion everywhere. Simple calculations estimate stress and strain anywhere in the bar, and these can then be related to observed crack heating.</p>
dc.description.comments <p>Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.</p> <p>This article appeared in <em>AIP Conference Proceedings</em>, 975 (2008): 491–497 and may be found at <a href="http://link.aip.org/link/doi/10.1063/1.2902701">http://dx.doi.org/10.1063/1.2902701</a>.</p>
dc.identifier archive/lib.dr.iastate.edu/aere_conf/8/
dc.identifier.articleid 1009
dc.identifier.contextkey 3481356
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_conf/8
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1934
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_conf/8/Holland_2008_TowardViableStrategy.pdf|||Sat Jan 15 01:57:19 UTC 2022
dc.subject.disciplines Aerospace Engineering
dc.subject.keywords infrared imaging
dc.subject.keywords structural acoustics
dc.subject.keywords acoustic wave production
dc.subject.keywords crack detection
dc.subject.keywords nondestructive testing
dc.subject.keywords nondestructive evaluation
dc.title Toward a Viable Strategy for Estimating Vibrothermographic Probability of Detection
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication dea444ce-079d-483e-8db1-c33100203381
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
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