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 53 for “"Uniform thickness"”.
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Design and Efficacy of a Variable Thickness Transtibial Prosthetic Liner
… the use of a novel, subject-specific, variable-thickness liner. To target the knee region, the liner thickness is defined as inversely proportional to the absolute value of the maximum skin strains measured during knee flexion. Areas of high strain correspond to a minimum liner thickness of 2 mm …
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Stresses in a Rotating Disc Due to Evenly Spaced Blade.
… for the stress distribution in a disc of uniform thickness when evenly spaced, radially directed loads, uniformly distributed over the thickness of the disc, are applied; and the stress distribution in the disc when evenly spaced in-plane moments are applied to the disc.
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Flutter of rectangular simply supported panels at high supersonic speeds
… problem of an isolated simply supported plate of uniform thickness. The same type of analysis can be applied, however, to other panel configurations. Clamped panels, integrally stiffened panels, arrays of panels, end others should be amenable to treatment by the model approach based on the static …
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Análise de placas circulares com ortotropia física ou geométrica
In the former, the plate has uniform thickness and its material has different elastic properties in the radial and circunferential directions; in the latter, the isotropic plate is stiffenned with uniformily spaced radial and circunferential ribs. For each case, the equilibrium differential …
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An analysis procedure for cylindrical and spherical shells subjected to multi-harmonic loads
… possible to obtain solutions for isotropic, uniform thickness shells without resorting to approximate techniques such as finite differences, finite elements, or numerical integration. The solutions are obtained in series form for single-layered, isotropic, uniform thickness shells with …
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Investigation into the molar feeding ratio and temperature dependence on the replacement reaction between platinum ions and silver nanoparticles
… partially formed, but at a 1:1 molar ratio, non-uniform thickness nanoshells were formed with large amounts of silver on the surface. The temperature dependence showed increasingly thick shell formation; however, cyclic voltammetry measurements indicated the surface of the nanoparticles contained …
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Rail shear testing of composite materials: analysis and experiment
… fixtures were investigated experimentally: a uniform thickness, bolted rail shear fixture, loaded diagonally across the specimen test section; and a tapered-thickness, bonded rail shear fixture, loaded axially along the centerline of the specimen test section. Test results include room …
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Wetting transition and fluid trapping in a microfluidic fracture
… may either remain stable or dewet as a film of uniform thickness, which is distinct from the classic viscous dewetting on smooth surface. We delineate three displacement regimes: complete displacement, thin film and thick film, in a phase diagram with theoretical criteria that govern the …
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Nonlinear deflections of a circular plate with varying thickness
… large strains in a circular plate with varying thickness and a circular membrane is considered. The exact tensor first approximation equilibrium equations, converted into physical equations for a rotationally symmetric thin plate are used with the Alexander constitutive relations for a …
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Analysis of spur gear teeth for static deflections
… as a rigidly supported, cantilever beam of uniform thickness tapered in the plane of load application. Deflection is considered to be caused by bending moment, shearing force, and Hertzian pressure at the point of load application. Two additional papers were written by Weber (25) and Attia …
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Effect of Reynolds Number and Geometry on the Undulatory Hydrodynamics of Tapered Elastic Plates
… of oscillating elastic plates with tapered and uniform thickness in an incompressible Newtonian fluid with varying medium properties and plate geometries is investigated numerically using a fully coupled fluid–structure interaction computational model. Thickness tapering leads to the acoustic …
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A numerical analysis of coupled solidification and natural convection within a two-dimensional rectangular cavity
… The solid layer that forms is assumed to have a uniform thickness. The Boussinesq system of equations is used to describe the liquid, and the one-dimensional heat conduction equation is used to describe the solid. The average temperature derivatives at the solid-liquid interface are used to …
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Experimental and theoretical investigation of the curing process of thermosetting composite structures with angle-bend
… curing cycles on temperature exotherms, thickness variation and fiber volume fraction distribution. Results from both simulation and experiment agree well. They also showed that parts produced using recommended curing cycles from manufacturers were not of good quality in terms of uniform …
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An Analysis of Non-Uniform Stress States in Finite Thin Film/substrate System: The Need of Full-Field Curvature Measurements
… and curvature states which are assumed to remain uniform over the entire film/substrate system. In this dissertation, we extend these methodologies to non-uniform stress and curvature states for the single layer of thin film or multi-layer thin film with non-uniform thickness subjected to …
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Parametric study of stresses in cooling-tower shells
… This thesis focuses on a cooling tower with uniform thickness where several geometric parameters like the hyperbolic axis ratio (bla), top opening angle , offset parameters (A), and scale of the structure are varied one at a time, to investigate the effect these parameters have on the …
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Squeeze-film flows, with application to the human knee joint
… constant load towards a thin rigid porous bed of uniform thickness coating a stationary flat impermeable solid is considered. Three related problems are considered separately, namely the case of a flat surface coated with a rigid layer, the case of a curved surface coated with a rigid layer and …
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Thermal Inactivation of Escherichia coli O157:H7 and Salmonella Agona in Wheat Flour
… to distribute cultures, and pressed to a uniform thickness (1mm) prior to heat treatment. Following treatment, samples were rapidly cooled and diluted with peptone water; then plated onto Tryptic Soy Agar (TSA) and incubated at 37°C for 24 h prior to enumeration. The minimum heat …
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Laser Nitrided and TiN coated Ti-6Al-4V alloy surfaces
… the analytical formulation. The maximum coating thickness achieved is in the order of 2 µm and maximum nitrided depth layer is 80 µm. It is found that the laser gas assisted nitriding provides a uniform thickness of the treated layer below the surface. The nitrided layer is free from the cracks …
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A study of three numerical methods for the analysis of circular plates symmetrically bent
… plates with and without a central hole, with uniform and with non-uniform thickness, and with abrupt steps in the thickness, and subjected to edge couples and shears, distributed loadings, ring line loads, and with concentrated load at the center. The outer edge is considered to be either …
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Study of space-time evolution of flux in a long-life traveling wave reactor
… on the outside, is surrounded by reflector of uniform thickness. To facilitate the study of flux profile, the two primary regions in the core are further divided into finer thin slab-like regions called cells. Results presented in this thesis show the propagation of flux profile from the …
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