Optimal design and testing of laminated specimens to evaluate competing composite failure criteria

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dc.contributor.authorWamelen, Arend Andries vanen
dc.contributor.departmentAerospace Engineeringen
dc.date.accessioned2014-03-14T21:42:16Zen
dc.date.adate2009-08-04en
dc.date.available2014-03-14T21:42:16Zen
dc.date.issued1993en
dc.date.rdate2009-08-04en
dc.date.sdate2009-08-04en
dc.description.abstractOptimization methods are used to find areas of maximum disagreement between the failure criteria of Tsai and Hart-Smith. The Tsai criterion is quadratic in the stresses and employs a selective and progressive ply-by-ply degradation scheme to predict ultimate load. Hart-Smith’s criterion is based on a fiber shear failure of the fibers and also predicts ultimate load. Both compression-compression and tension-shear combinations are identified as areas of large difference in predicted failure loads. Graphite-epoxy specimens are designed to maximize the difference in the failure loads computed from the two criteria under uniaxial tension. Both on-axis and ten-degree off-axis specimens are designed and tested. The laminates that maximize the difference in these criteria exploit the manner in which they treat the effect of in-plane shear on the failure prediction. Test results indicate little difference in the failure prediction for the on-axis test. However, the off-axis tests show that the Tsai criterion predicts failure much closer to the test results.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 99 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08042009-040517en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08042009-040517/en
dc.identifier.urihttp://hdl.handle.net/10919/44176en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1993.W363.pdfen
dc.relation.isformatofOCLC# 29400877en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.W363en
dc.subject.lcshLaminated materialsen
dc.subject.lcshStrains and stressesen
dc.titleOptimal design and testing of laminated specimens to evaluate competing composite failure criteriaen
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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