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 20 of 336 for “"finite element modeling"”.
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Finite element modeling of lead acid batteries
This thesis investigates the finite element method with regard to the macrohomogeneous theory for flooded porous electrochemical cells, more specifically lead-acid cells. One- and two-dimensional finite element models are developed for flooded porous electrochemical lead acid cells. Chapter One …
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Baseline finite element modeling of government bridge
… desired. This paper discusses the creation of a finite element model of Government Bridge, located between Rock Island, Illinois and Davenport, Iowa, a historic structure dating back to the late nineteenth century, to help develop these indices and verify the efficacy of utilizing structural …
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Finite element modeling of the human eye
A three-dimensional finite element model was created to analyze the mechanical interactions between the various substructures within the human eye. During certain activities, mechanical interactions may lead to a resultant distribution of stresses within the eye that may in turn produce various …
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A Mathematical Discussion of Corotational Finite Element Modeling
This thesis discusses the mathematics of the Element Independent Corotational (EICR) Method and the more general Unified Small-Strain Corotational Formulation. The former was developed by Rankin, Brogan and Nour-Omid [106]. The latter, created by Felippa and Haugen [49], provides a theoretical …
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Finite element modeling of high frequency irreversible electroporation
… was to contribute to this understanding by using finite element method (FEM) computational models of HFIRE to determine how specific electroporation waveform parameters affect ablation patterns in tissue and validating these results against experimental measurements. The effects of heterogeneous …
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Finite-element modeling of a composite bridge deck
… an example being bridge decks. In this study a finite-element model using the software ANSYS is developed for an 8&inches;-thick low-profile FRP bridge deck (Prodeck 8) made of E-glass fiber and Polyester resin. The bridge deck is subjected to a patch load at the center and the finite-element …
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Nonlinear probabilistic finite element modeling of composite shells
A probabilistic finite element analysis procedure for laminated composite shells has been developed. A total Lagrangian finite element formulation, employing a degenerated 3-D laminated composite shell element with the full Green-Lagrange strains and first-order shear deformable kinematics, forms …
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Finite Element Modeling and Validation of the Patellofemoral Joint
… whose final goal is to obtain a validated finite element modeling framework that can predict patellofemoral contact mechanics and changes after TTO surgery, assess patients before surgery, and plan the surgery accordingly with quantified measurements. The aim is to obtain the best surgical …
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Explicit Finite Element Modeling of the Human Lumbar Spine
<p>Validated finite element (FE) models of the functional spinal unit (FSU) and lumbar spine are essential in design-phase device development and in assessing the mechanics associated with normal spine function and degenerative disc disease (DDD), as well as the impact of fusion and total disc …
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Finite Element Modeling of Patient-Specific Total Shoulder Arthroplasty
… of patient specificity in computational modeling and has the potential to inform surgical planning to improve implanted joint mechanics and potentially patient outcomes.</p>
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Optimization of superconducting magnetic bearings using finite element modeling
… superconductors tend to repel magnetic flux. The Finite Element Method was used to model superconducting bearings and optimize their dimensions. Computer simulations were written to simulate the superconducting state as well as perform the optimization. Not only the effect of changing the …
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Finite element modeling of flow through ceramic pot filters
… to the global standard. This thesis uses finite-element groundwater-flow modeling software to develop models of flow through three different ceramic filter shapes: flowerpot, paraboloid, and hemispheric filters. A sensitivity analysis was then conducted for each filter shape by simulating …
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Finite Element Modeling of Steel Corrosion in Concrete Structures
… corrosion. This study has developed a nonlinear finite element analysis program, called VT-MultiPhys, to enable multi-physics simulations, including analyses of chloride-induced corrosion. The program includes constitutive laws, element formulations and global solution schemes to allow the …
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Finite Element Modeling Driven by Health Care and Aerospace Applications
… of mesh generation algorithms encountered in finite element modeling in health care and aerospace. The finite element method can reduce a continuous system to a discrete idealization that can be solved in the same manner as a discrete system, provided the continuum is discretized into a finite …
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Finite Element Modeling of Seismic Wave Propagation in Earthen Embankments
… shape of embankment was studied via 2D and 3D finite element (FE) embankment models. Artificial reflections from external boundaries and numerical dispersion were first examined in the frame work of COMSOL. A combination of an absorbing layer and dashpot elements produced minimal reflections. …
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Finite Element Modeling of Strain Localization Initiated by Geometric Irregularities
… common phenomenon in inelastic deformation. The modeling of this phenomenon by the finite element method is hampered by a number of factors; the lack of a priori knowledge of the location, direction, and onset of the localized zones, and the inability of conventional isoparametric elements to …
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Finite Element Modeling and Structural Behavior of Concrete Tunnel Linings
… manner. For numerical analysis, a nonlinear finite element computer program was developed to perform parametric studies to investigate a wide range of the key variables and determine how they affect the design.
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Finite Element Modeling of Tow-Placed Variable-Stiffness Composite Laminates
… In this thesis, a method of creating a finite element model of tow-placed variable-stiffness composite panels is presented. This method provides a representation of the overlap regions and an accurate model of the fiber-orientation angle change throughout the laminate. The GENESIS finite …
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