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Fatigue behavior of ceramic matrix composites at elevated temperatures under cyclic loading

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dc.contributor.authorElahi, Mehranen
dc.contributor.committeechairReifsnider, Kenneth L.en
dc.contributor.committeememberDuke, John C. Jr.en
dc.contributor.committeememberMook, Dean T.en
dc.contributor.committeememberKriz, Ronald D.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:12:31Zen
dc.date.adate2008-06-06en
dc.date.available2014-03-14T21:12:31Zen
dc.date.issued1996-12-19en
dc.date.rdate2008-06-06en
dc.date.sdate2008-06-06en
dc.description.abstractTo achieve satisfactory levels of strength, fracture toughness, and reliability for man-rated systems such as jet engines, fiber reinforced ceramic matrix composites are needed. An elevated temperature axial testing system is developed to investigate and characterize fatigue behavior of Nicalon fiber reinforced enhanced silicon carbide matrix. composites at 1800 of under fully reversed cyclic loading. Notch effect on quasi-static tensile response is also considered. Quasi-static and fatigue damage mechanisms and failure modes are examined using various specimen geometries, load levels, fatigue ratios, and laminates stacking sequences by employing a number of NDE techniques. Issues such as damage tolerance and durability are addressed by conducting interrupted fatigue tests at various stages of life for different load levels. Results are compared to the predictions of remaining strength and life, obtained using a performance simulation code. Initial results indicate existence of a threshold stress value which limits the use of the material system.en
dc.description.degreePh. D.en
dc.format.extentxii, 209 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06062008-154429en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06062008-154429/en
dc.identifier.urihttp://hdl.handle.net/10919/38074en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1996.E434.pdfen
dc.relation.isformatofOCLC# 36762639en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectlife predictionen
dc.subjectceramic matrix compositesen
dc.subjectFatigueen
dc.subjectelevated temperatureen
dc.subjectstrength predictionen
dc.subjectlifeen
dc.subjectremaining strengthen
dc.subject.lccLD5655.V856 1996.E434en
dc.titleFatigue behavior of ceramic matrix composites at elevated temperatures under cyclic loadingen
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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