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dc.contributor.advisorMisra, Anil
dc.contributor.authorMarangos, Orestes
dc.date.accessioned2012-11-19T23:27:32Z
dc.date.available2012-11-19T23:27:32Z
dc.date.issued2010-05-31
dc.date.submitted2010
dc.identifier.otherhttp://dissertations.umi.com/ku:10914
dc.identifier.urihttp://hdl.handle.net/1808/10403
dc.description.abstractThe Scanning Acoustic Microscope (SAM) is a powerful tool for understanding the mechanical characteristics of substrates with micro-scale near-surface graded layers. To interpret the SAM results from such substrates, a theoretical model was developed that incorporated the interaction of focused ultrasonic field, with a substrate having a near-surface graded layer. The focused ultrasonic field model was formulated in terms of spherical wave expansions. The substrate wave propagation was computed with a multilayered stiffness method. The bridging between the two models was accomplished by utilizing the angular spectrum. A commercial SAM was used to characterize a dentin substrate subjected to acid-etching. Calibration and a homotopic measurement protocol were developed for data accuracy and meaningful data comparison from pre and post etching states. The reflection coefficients from the SAM measurement for the etched dentin exhibited frequency dependent attenuation. The developed theoretical model was successfully applied to explain the observed frequency dependent phenomenon.
dc.format.extent128 pages
dc.language.isoEN
dc.publisherUniversity of Kansas
dc.rightsThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
dc.subjectCivil engineering
dc.subjectAcoustic microscopy
dc.subjectDentin
dc.subjectGraded materials
dc.subjectHomotopic measurement
dc.subjectMicromechanics
dc.subjectSpherical harmonics expansion
dc.titleSCANNING ACOUSTIC MICROSCOPY MODELING FOR MICROMECHANICAL MEASUREMENTS OF COMPLEX SUBSTRATES
dc.typeDissertation
dc.contributor.cmtememberSpencer, Paulette
dc.contributor.cmtememberAdams, Craig
dc.contributor.cmtememberKieweg, Sarah
dc.contributor.cmtememberHan, Jie
dc.contributor.cmtememberParsons, Robert L.
dc.thesis.degreeDisciplineCivil, Environmental, & Architectural Engineering
dc.thesis.degreeLevelPh.D.
kusw.oastatusna
kusw.oapolicyThis item does not meet KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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