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dc.contributor.authorSreeranganathan, Arunen_US
dc.date.accessioned2008-09-17T19:24:53Z
dc.date.available2008-09-17T19:24:53Z
dc.date.issued2008-05-19en_US
dc.identifier.urihttp://hdl.handle.net/1853/24607
dc.description.abstractThis dissertation research focuses on micromechanical modeling and simulations of two-phase heterogeneous materials exhibiting anisotropic and non-uniform microstructures with long-range spatial correlations. Completed work involves development of methodologies for realistic micromechanical analyses of materials using a combination of stereological techniques, two- and three-dimensional digital image processing, and finite element based modeling tools. The methodologies are developed via its applications to two technologically important material systems, namely, discontinuously reinforced aluminum composites containing silicon carbide particles as reinforcement, and boron modified titanium alloys containing in situ formed titanium boride whiskers. Microstructural attributes such as the shape, size, volume fraction, and spatial distribution of the reinforcement phase in these materials were incorporated in the models without any simplifying assumptions. Instrumented indentation was used to determine the constitutive properties of individual microstructural phases. Micromechanical analyses were performed using realistic 2D and 3D models and the results were compared with experimental data. Results indicated that 2D models fail to capture the deformation behavior of these materials and 3D analyses are required for realistic simulations. The effect of clustering of silicon carbide particles and associated porosity on the mechanical response of discontinuously reinforced aluminum composites was investigated using 3D models. Parametric studies were carried out using computer simulated microstructures incorporating realistic microstructural attributes. The intrinsic merit of this research is the development and integration of the required enabling techniques and methodologies for representation, modeling, and simulations of complex geometry of microstructures in two- and three-dimensional space facilitating better understanding of the effects of microstructural geometry on the mechanical behavior of materials.en_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectMicromechanicsen_US
dc.subjectFinite element analysisen_US
dc.subjectCompositesen_US
dc.subjectIndentationen_US
dc.subjectRepresentative volume elementen_US
dc.subjectMicrostructure modelingen_US
dc.subject.lcshInhomogeneous materials
dc.subject.lcshMicromechanics
dc.subject.lcshMicrostructure
dc.subject.lcshMathematical models
dc.titleRealistic micromechanical modeling and simulation of two-phase heterogeneous materialsen_US
dc.typeDissertationen_US
dc.description.degreePh.D.en_US
dc.contributor.departmentMaterials Science and Engineeringen_US
dc.description.advisorCommittee Chair: Gokhale, Arun; Committee Member: Gall, Kenneth; Committee Member: Garmestani, Hamid; Committee Member: Kurtis, Kimberly; Committee Member: Thadhani, Nareshen_US


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