Determination of thermal strains in the neighborhood of a bimaterial interface

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dc.contributor.authorWood, Judy D.en
dc.contributor.committeechairPost, Danielen
dc.contributor.committeememberReifsnider, Kenneth L.en
dc.contributor.committeememberLytton, Jack L.en
dc.contributor.committeememberMorris, Don H.en
dc.contributor.committeememberSmith, Charles W.en
dc.contributor.departmentMaterials Engineering Scienceen
dc.date.accessioned2014-03-14T21:14:48Zen
dc.date.adate2006-06-07en
dc.date.available2014-03-14T21:14:48Zen
dc.date.issued1992en
dc.date.rdate2006-06-07en
dc.date.sdate2006-06-07en
dc.description.abstractAn experimental analysis was conducted on a bimaterial plate of steel and brass, subjected to a uniform temperature change. The steel and brass portions of the plate were joined along a common edge with a nearly zero thickness medium. Whole-field, in-plane displacement measurements U and V were made by means of high-sensitivity moiré interferometry. The corresponding distributions of stresses, σ<sub>x</sub>, σ<sub>y</sub>, and τ<sub>xy</sub> were determined for the free surface. Near the interface, and along its length, the largest stresses were σ<sub>y</sub>, acting perpendicular to the interface. The σ<sub>y</sub> peaks occurred very close to the interface, but not on it. These peak values were tensile in the steel and compressive in the brass. The transition between these opposite peak stresses featured an extremely strong gradient in a 50 µm interface zone. The distribution was akin to that of a stress singularity, but the stresses reached finite peak values in the physical experiment. Even larger stresses were found near the corner, where the interface of the two materials intersects the free edge. Both macroscopic and microscopic moiré interferometry were required to determine the stress distribution.en
dc.description.degreePh. D.en
dc.format.extentx, 107 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06072006-124140en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06072006-124140/en
dc.identifier.urihttp://hdl.handle.net/10919/38531en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1992.W662.pdfen
dc.relation.isformatofOCLC# 25753572en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1992.W662en
dc.subject.lcshBrassen
dc.subject.lcshSteelen
dc.subject.lcshThermal stressesen
dc.titleDetermination of thermal strains in the neighborhood of a bimaterial interfaceen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineMaterials Engineering Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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