Static and free-vibrational response of semi-circular graphite- epoxy frames with thin-walled open sections

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dc.contributor.authorCollins, J. Scotten
dc.contributor.committeechairJohnson, Eric R.en
dc.contributor.committeememberKapania, Rakesh K.en
dc.contributor.committeememberHyer, Michael W.en
dc.contributor.committeememberGriffin, Odis Hayden Jr.en
dc.contributor.departmentAerospace and Ocean Engineeringen
dc.date.accessioned2014-03-14T21:28:41Zen
dc.date.adate2013-02-06en
dc.date.available2014-03-14T21:28:41Zen
dc.date.issued1989-10-05en
dc.date.rdate2013-02-06en
dc.date.sdate2013-02-06en
dc.description.abstractExperiments were conducted to measure the three-dimensional static and free vibrational response of two graphite-epoxy, thin-walled, open section frames. The frames are semi-circular with a radius of three feet, and one specimen has an I cross section and the other has a channel cross section. The flexibility influence coefficients were measured in static tests for loads applied at midspan with the ends of the specimens clamped. Natural frequencies and modes were determined from vibrational tests for free and clamped end conditions. The experimental data is used to evaluate a new finite element which was developed specifically for the analysis of curved, thin-walled structures. The formulation of the element is based on a Vlaysov-type, thin-walled, curved beam theory. The predictions from the finite element program generally correlated well with the experimental data for the symmetric I-specimen. Discrepancies in some of the data were found to be due to flexibility in the รข clamped' end conditions. With respect to the data for the channel specimen, the correlation was less satisfactory. The finite element analysis predicted the out-of-plane response of the channel specimen reasonably well, but large discrepancies occurred between the predicted in-plane response and the experimental data. The analysis predicted a much more compliant in-plane response then was observed in the experiments.en
dc.description.degreeMaster of Scienceen
dc.format.extentxii, 204 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-02062013-040146en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02062013-040146/en
dc.identifier.urihttp://hdl.handle.net/10919/40950en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1989.C665.pdfen
dc.relation.isformatofOCLC# 20867715en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1989.C665en
dc.subject.lcshAirframes -- Researchen
dc.subject.lcshStructural frames -- Researchen
dc.titleStatic and free-vibrational response of semi-circular graphite- epoxy frames with thin-walled open sectionsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAerospace and Ocean Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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