Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"crystal plasticity finite element"”.
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Understanding the deformation mechanisms in nanostructured metals by a novel discrete crystal plasticity finite element model
… simulations indicate that dislocation-mediated plasticity in nanostructured metals and alloys is significantly different from that in their coarse-grained counterparts. Therefore, this dissertation focuses on the exploration of the deformation mechanisms in nanostructured metals via crystal …
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Microstructure-informed modeling of hydrogen diffusion in zirconium polycrystals
… of nuclear pressure tubes. This thesis uses a crystal plasticity finite element model coupled with diffusion equations to study the effects of localized deformation at the grain scale on the hydrogen diffusion and hydride precipitation in zirconium. Attention is given to the effects of crystals …
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ON DEFORMATION STABILITY AND DUCTILE DAMAGE IN NANOTWINNED METALS
… (NT) materials. To that end, we implement a crystal plasticity finite element framework for nanotwinned FCC metals, which accounts for slip gradients that are intrinsically coupled to TB migration. Using this framework, we extract intricate coupling between rates of TB migration and twin …
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Multiscale In-Situ Characterization of Crystal Orientation, Temperature, and Microstructure Effects on Creep Defromation of Pure Magnesium and Mg-Al-RE Alloys
… elevated temperatures. This thesis examines how crystal orientation, temperature, and β-phase morphology govern creep behavior in pure Mg and AE44 alloys. Novel in-situ nanoindentation creep methods were developed using an indenter inside a SEM. Additional techniques included in-situ tensile …
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Calibration of empirical, semi-empirical, and physics-based material models for the prediction of creep and tensile behaviour of Alloy 617
… The third study calibrates three physics-based crystal plasticity finite element method (CPFEM) models using a multi-objective surrogate-assisted calibration workflow to capture multiscale tensile behaviour. The CPFEM models accurately captured the stress–strain response and texture evolution …
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Experimental and Computational Micromechanics of Aluminum Cerium Alloys and Selective Laser Melted 316L Stainless Steel
… framework to develop a crystal plasticity finite element model for extruded Al-8Ce-10Mg alloys. The calibrated model is used to perform multiple simulations evaluate the possible effect changes intermetallic content and grain orientation texture have on the mechanical …