Structural analysis of geodesically stiffened composite panels with variable stiffener distribution

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dc.contributor.authorGrall, Brunoen
dc.contributor.committeechairGürdal, Zaferen
dc.contributor.committeememberGriffin, Odis Hayden Jr.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:52:23Zen
dc.date.adate2009-12-23en
dc.date.available2014-03-14T21:52:23Zen
dc.date.issued1992-05-15en
dc.date.rdate2009-12-23en
dc.date.sdate2009-12-23en
dc.description.abstractA computationally efficient analysis approach is developed to predict buckling load of geodesically stiffened composite panels under in-plane loads. The analysis procedure accounts for the contribution of the in-plane extensional and out-of-plane bending stiffnesses of the stiffeners through the use of Lagrange multipliers in an energy method solution. The analysis is used to isolate the effect of various stiffener deformation modes on the buckling load and skin deformation patterns of geodesically stiffened panels under various load combinations. The analysis routines are then coupled with the numerical optimizer ADS to create a package for the design of minimum-mass stiffened panels, subject to constraints on buckling of the panel assembly and material strength failure. Material failure in the skin and stiffeners are estimated using a maximum strain criterion. The design variables that can be used for optimization include thickness of the skin laminate, stiffener thickness and height, and positions of straight stiffeners. Applied loads are uniaxial compression, pure shear, and combined compression-shear.en
dc.description.degreeMaster of Scienceen
dc.format.extentx, 114 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-12232009-020522en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12232009-020522/en
dc.identifier.urihttp://hdl.handle.net/10919/46401en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1992.G724.pdfen
dc.relation.isformatofOCLC# 26820088en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1992.G724en
dc.subject.lcshBuckling (Mechanics)en
dc.subject.lcshComposite materialsen
dc.titleStructural analysis of geodesically stiffened composite panels with variable stiffener distributionen
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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