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dc.contributor.advisorReddy, J. N.en_US
dc.creatorKaredla-Ravi, Shankaren_US
dc.date.accessioned2007-09-17T19:32:41Z
dc.date.available2007-09-17T19:32:41Z
dc.date.created2003-05en_US
dc.date.issued2007-09-17
dc.identifier.urihttp://hdl.handle.net/1969.1/5783
dc.description.abstractA phenomenological cohesive term is proposed and added to an existing cohesive constitutive law (by Roy and Dodds) to model the crack tip high inertia region proposed by Gao. The new term is attributed to fracture mechanisms that result in high energy dissipation around the crack tip and is assumed to be a function of external energy per volume input into the system. Finite element analysis is performed on PMMA with constant velocity boundary conditions and mesh discretization based on the work of Xu and Needleman. The cohesive model with the proposed dissipative term is only applied in the high inertia zone i.e., to cohesive elements very close to the crack tip and the traditional Roy and Dodds model is applied on cohesive elements in the rest of the domain. It was observed that crack propagated in three phases with a speed of 0.35cR before branching, which are in good agreement with experimental observations. Thus, modeling of high inertia zone is one of the key aspects to understanding brittle fracture.en_US
dc.format.extent3545800 bytes
dc.format.extent6577220 bytes
dc.format.extent3517506 bytes
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/octet-stream
dc.format.mimetypeapplication/octet-stream
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.subjectdynamic crack propagationen_US
dc.subjecthigh inertia zoneen_US
dc.subjectcohesive zone modelingen_US
dc.subjectfinite element analysisen_US
dc.subjectfracture mechanicsen_US
dc.titleModeling of crack tip high inertia zone in dynamic brittle fractureen_US
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameDoctor of Philosophyen_US
thesis.degree.levelDoctoralen_US
dc.contributor.committeeMemberHogan, Harryen_US
dc.contributor.committeeMemberKinra, Vikram K.en_US
dc.contributor.committeeMemberWalton, Jay R.en_US
dc.type.genreElectronic Dissertationen_US
dc.type.materialtexten_US
dc.format.digitalOriginborn digitalen_US


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