Combined structural and manufacturing optimization of stiffened composite panels

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dc.contributor.authorHenderson, Joseph Lynnen
dc.contributor.committeecochairGürdal, Zaferen
dc.contributor.committeememberLoos, Alfred C.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.departmentAerospace Engineeringen
dc.date.accessioned2014-03-14T21:46:01Zen
dc.date.adate2008-09-18en
dc.date.available2014-03-14T21:46:01Zen
dc.date.issued1996-07-05en
dc.date.rdate2008-09-18en
dc.date.sdate2008-09-18en
dc.description.abstractManufacturing considerations have been incorporated into the design optimization of a blade-stiffened composite panel. For the manufacturing analysis, a one-dimensional resin film infusion model is developed to compute the infiltration time of the resin into a fabric preform of the panel. Results are presented showing the effects of structurally important design variables, such as cross-sectional geometry and material properties, on the manufacturing performance of the panel. In addition, the effects of manufacturing process variables, such as pressure and temperature, on the structural performance are studied. The structural problem is formulated to minimize the panel mass subject to buckling constraints. A simplified buckling analysis model for the panel is used to compute the critical buckling loads. The objective of the manufacturing problem is to minimize the resin infiltration time. Optimum panel designs for the manufacturing and structures problems alone, as well as for the combined problem, are generated using a genetic algorithm. These results indicate a strong connection between the structures and manufacturing design variables and trade-offs between the responses, illustrating that a multidisciplinary approach to the problem is essential to incorporating manufacturing into the preliminary design stage.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 104 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-09182008-063429en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09182008-063429/en
dc.identifier.urihttp://hdl.handle.net/10919/44819en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.H463.pdfen
dc.relation.isformatofOCLC# 35615369en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectcompositesen
dc.subjectstructuresen
dc.subjectmanufacturingen
dc.subjectdesign optimizationen
dc.subjectgenetic algorithmsen
dc.subjectstiffened panelsen
dc.subject.lccLD5655.V855 1996.H463en
dc.titleCombined structural and manufacturing optimization of stiffened composite panelsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAerospace Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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