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dc.contributor.authorEngelbrecht-Wiggans, Amy
dc.date.accessioned2018-10-03T19:27:43Z
dc.date.available2019-12-18T07:01:18Z
dc.date.issued2017-12-30
dc.identifier.otherEngelbrechtWiggans_cornellgrad_0058F_10570
dc.identifier.otherhttp://dissertations.umi.com/cornellgrad:10570
dc.identifier.otherbibid: 10474194
dc.identifier.urihttps://hdl.handle.net/1813/59091
dc.description.abstractStress rupture is a catastrophic failure mode in continuous unidirectional fiber composites, such as those used in composite overwrapped pressure vessels (COPVs). COPVs are currently used mainly in aerospace applications, such as storing the reserve oxygen on the International Space Station. Indeed a carbon/epoxy COPV failure caused the September 2016 explosion of the SpaceX Falcon 9 rocket at Cape Canaveral, leading to more than a billion dollars of damage. Currently COPVs are used in relatively small numbers, but the day is rapidly approaching when they will be used in the millions in many aspects of daily life, particularly in automotive applications. My research seeks to better understand stress rupture and more accurately estimate the probability that a specific composite structure will fail in stress rupture. Prediction of a composite’s stress rupture behavior is heavily based on results from extensive testing, as there are not yet methods to predict a composite’s stress rupture behavior based on the component materials’ properties. Testing results in comparatively small datasets of accelerated test data, which then must be extrapolated to predict a failure probability for a the service life of interest. This dissertation shows that the method used to analyze these datasets is crucial to accurately estimating the probability of a stress rupture failure, and also presents a data analysis method with lower variance and MSE estimates than current ad-hoc industry methods. Furthermore this dissertation compares current stress rupture models and derives a new, micromechanical stochastic stress rupture model.
dc.language.isoen_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectComposite failure
dc.subjectCOPV
dc.subjectstatistical analysis
dc.subjectStress rupture
dc.subjectMechanical engineering
dc.subjectMechanics
dc.titleAnalysis and Test Strategies for Stress Rupture in Unidirectional Continuous Fiber Composite Structures
dc.typedissertation or thesis
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorCornell University
thesis.degree.levelDoctor of Philosophy
thesis.degree.namePh. D., Mechanical Engineering
dc.contributor.chairPhoenix, Stuart Leigh
dc.contributor.committeeMemberSamorodnitsky, Gennady
dc.contributor.committeeMemberSilberstein, Meredith
dcterms.licensehttps://hdl.handle.net/1813/59810
dc.identifier.doihttps://doi.org/10.7298/X4S75DHD


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