Statistical methods applied to acousto-ultrasonic technique

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dc.contributor.authorMadhav, Arunen
dc.contributor.committeecochairHenneke, Edmund G. IIen
dc.contributor.committeecochairNachlas, Joel A.en
dc.contributor.committeememberDuke, John C. Jr.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:49:55Zen
dc.date.adate2012-11-17en
dc.date.available2014-03-14T21:49:55Zen
dc.date.issued1987-09-03en
dc.date.rdate2012-11-17en
dc.date.sdate2012-11-17en
dc.description.abstractThe growth in the extent of applications of composite materials, particularly in commercial products, has been dramatic and carries an implied mandate for effective methods for material quality evaluation. The cost of composite materials dictates that non-destructive test methods be used. At the same time, the nature of composites limits the use of conventional techniques such as radiography , eddy-current or ultrasonics. Recently, a new technique known as the Acousto-Ultrasonic (AU) technique, has been developed and appears to hold promise as a method for the evaluation of composite material quality. Implementation of the AU method is examined using the zeroth moment method developed by Henneke et.al. A new parameter termed as Acousto Ultrasonic Factor (AUF) has been defined for this purpose. The behavior of the AUF response to specimens of known quality is investigated statistically. It is found that the transformed/actual readings follow a Beta distribution and that specimens of different quality are readily distinguishable using the statistical analysis of the AUF response. Reasonable future steps for translating these findings into efficient quality evaluation methods have been suggested.</pen
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 77 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11172012-040146en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11172012-040146/en
dc.identifier.urihttp://hdl.handle.net/10919/45791en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1987.M337.pdfen
dc.relation.isformatofOCLC# 17373252en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1987.M337en
dc.subject.lcshComposite materialsen
dc.subject.lcshStress wavesen
dc.subject.lcshUltrasonic waves -- Statistical methodsen
dc.titleStatistical methods applied to acousto-ultrasonic techniqueen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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