Nonlinear probabilistic finite element modeling of composite shells

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dc.contributor.authorEngelstad, Stephen Philipen
dc.contributor.committeechairReddy, Junuthula N.en
dc.contributor.committeememberFrederick, Danielen
dc.contributor.committeememberSingh, Mahendra P.en
dc.contributor.committeememberCramer, Mark S.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:18:15Zen
dc.date.adate2008-08-25en
dc.date.available2014-03-14T21:18:15Zen
dc.date.issued1990-11-05en
dc.date.rdate2008-08-25en
dc.date.sdate2008-08-25en
dc.description.abstractA probabilistic finite element analysis procedure for laminated composite shells has been developed. A total Lagrangian finite element formulation, employing a degenerated 3-D laminated composite shell element with the full Green-Lagrange strains and first-order shear deformable kinematics, forms the modeling foundation. The first-order second-moment technique for probabilistic finite element analysis of random fields is employed and results are presented in the form of mean and variance of the structural response. The effects of material nonlinearity are included through the use of a rate-independent anisotropic plasticity formulation with the macroscopic point of view. Both ply-level and micromechanics-level random variables can be selected, the latter by means of the Aboudi micromechanics model. A number of sample problems are solved to verify the accuracy of the procedures developed and to quantify the variability of certain material type/structure combinations. Experimental data is compared in many cases, and the Monte Carlo simulation method is used to check the probabilistic results. In general, the procedure is quite effective in modeling the mean and variance response of the linear and nonlinear behavior of laminated composite shells.en
dc.description.degreePh. D.en
dc.format.extentxiii, 199 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08252008-162620en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08252008-162620/en
dc.identifier.urihttp://hdl.handle.net/10919/39244en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1990.E744.pdfen
dc.relation.isformatofOCLC# 23674060en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1990.E744en
dc.subject.lcshComposite materialsen
dc.subject.lcshShells (Engineering)en
dc.titleNonlinear probabilistic finite element modeling of composite shellsen
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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