Vibration, buckling and postbuckling of laminated composites with delaminations

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dc.contributor.authorLee, Jaehongen
dc.contributor.committeecochairGriffin, O. Hayden Jr.en
dc.contributor.committeecochairGurdal, Zaferen
dc.contributor.committeememberReddy, Junuthula N.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.committeememberMook, Dean T.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:14:09Zen
dc.date.adate2008-06-06en
dc.date.available2014-03-14T21:14:09Zen
dc.date.issued1992-05-15en
dc.date.rdate2008-06-06en
dc.date.sdate2008-06-06en
dc.description.abstractFree vibration, buckling and postbuckling analyses of laminated composite plates with multiple delaminations are presented. A fInite element method based on a layer-wise laminated composite plate theory is developed to formulate the problem. Geometric nonlinearity in the sense of von Karman and the imperfection in the plate in the form of initial global deflection and initial delamination openings are included. A simple contact algorithm which precludes the physically inadmissible overlapping between delaminated surfaces is proposed and incorporated in the analysis. A sublaminate concept is adopted in the analysis to reduce the computational efforts, and found to be efficient. Numerical results are obtained for through-the-width, circular and rectangular delaminations addressing the effects of the number of delaminations, their lengths and through-the-thickness and axial locations on the critical buckling load and buckling mode shapes as well as free vibration frequency and modes. Postbuckling responses are investigated with respect to different magnitudes and directions of initial imperfections. The effects of material anisotropy and contact condition between delaminated surfaces are also considered. It is found that the proposed approach is very efficient and powerful for solving the above mentioned problems.en
dc.description.degreePh. D.en
dc.format.extentxv, 219 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06062008-170322en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06062008-170322/en
dc.identifier.urihttp://hdl.handle.net/10919/38398en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1992.L43.pdfen
dc.relation.isformatofOCLC# 26353927en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1992.L43en
dc.subject.lcshComposite materials -- Delaminationen
dc.subject.lcshLaminated compositesen
dc.titleVibration, buckling and postbuckling of laminated composites with delaminationsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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