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dc.creatorTao, Chengchengen_US
dc.date.accessioned2014-12-23T05:19:00Z
dc.date.available2014-12-23T05:19:00Z
dc.date.created2014-08en_US
dc.date.issued2014-08-15en_US
dc.date.submittedAugust 2014en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/37116
dc.description.abstractThis thesis develops an experimentally calibrated computational model based on crystal plasticity for the analysis of α-Ti-7Al polycrystalline alloys. The crystal plasticity finite element model uses rate and size-dependent anisotropic elasto plasticity constitutive law. The study contains a combination of orientation imaging microscopy (OIM), misorientation, microtesting, computational simulations and minimization process, including genetic algorithms for calibration of the material parameters and characterization. Size effects are also taken into consideration in the analysis. The polycrystalline Ti-7Al computational model involves statistically equivalent orientation distributions to those observed in the orientation imaging scans. Simulations detected effects of orientation, misorientation and microtexture distributions through simulations. Constant strain rate test is simulated with this model, and the results are compared with experiments.en_US
dc.format.mimetypeapplication/pdfen_US
dc.languageen
dc.publisherJohns Hopkins University
dc.subjectCrystal Plasticityen_US
dc.subjectFinite Element Methoden_US
dc.subjectTitanium alloysen_US
dc.titleCrystal Plasticity Based Finite Element Modeling in Polycrystalline Ti-7Al Alloysen_US
dc.typeThesisen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.grantorJohns Hopkins Universityen_US
thesis.degree.grantorWhiting School of Engineeringen_US
thesis.degree.levelMastersen_US
thesis.degree.nameM.S.E.en_US
dc.type.materialtexten_US
thesis.degree.departmentMechanical Engineeringen_US
dc.contributor.committeeMemberGhosh, Somnathen_US
dc.contributor.committeeMemberEl-Awady, Jaafar A.en_US


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