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dc.contributor.authorRich, Jonathan E.en_US
dc.date.accessioned2014-03-14T20:47:06Z
dc.date.available2014-03-14T20:47:06Z
dc.date.issued1997-09-12en_US
dc.identifier.otheretd-102797-122544en_US
dc.identifier.urihttp://hdl.handle.net/10919/35512
dc.description.abstractAn optimization strategy for the design of composite shells is investigated. This study differs from previous work in that an advanced analysis package is utilized to provide buckling information on potential designs. The Structural Analysis of General Shells (STAGS) finite element code is used to provide linear buckling calculations for a minimum buckling load constraint. A response surface, spanning the design space, is generated from a set of design points and corresponding buckling load data. This response surface is incorporated into a genetic algorithm for optimization of composite cylinders. Laminate designs are limited to those that are balanced and symmetric. Three load cases and four different variable formulations are examined. In the first approach, designs are limited to those whose normalized in-plane and out-of-plane stiffness parameters would be feasible with laminates consisting of two independent fiber orientation angles. The second approach increases the design space to include those that are bordered by those in the first approach. The third and fourth approaches utilize stacking sequence designs for optimization, with continuous and discrete fiber orientation angle variation, respectively. For each load case and different variable formulation, additional runs are made to account for inaccuracies inherent in the response surface model. This study concluded that this strategy was effective at reducing the computational cost of optimizing the composite cylinders.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartetd3.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectgenetic algorithmen_US
dc.titleDesign Optimization Procedure for Monocoque Composite Cylinder Structures Using Response Surface Techniquesen_US
dc.typeThesisen_US
dc.contributor.departmentEngineering Science and Mechanicsen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEngineering Science and Mechanicsen_US
dc.contributor.committeechairGürdal, Zaferen_US
dc.contributor.committeememberBatra, Romesh C.en_US
dc.contributor.committeememberHyer, Michael W.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-102797-122544/en_US
dc.date.sdate1997-09-12en_US
dc.date.rdate1997-12-03
dc.date.adate1997-12-03en_US


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