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 38 for “"Structural strength"”.
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Decision framework for selecting structural strength of new facility on the airbase
… facility in which major assets are operated, the structural strength of the building is designed to withstand explosions. Air forces in most countries, including NATO and USDOD, provide design criteria to assist in selecting the appropriate structural strength for new buildings through risk …
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Uncertainty in marine structural strength with application to compressive failure of longitudinally stiffened panels
It is important in structural analysis and design, whether deterministic or reliability-based, to know the level of uncertainty for the methods of strength prediction. The uncertainty associated with strength prediction is the result of ambiguity and vagueness in the system. This study addresses …
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Development of Multidisciplinary Design Optimization Process for a Large Scale Hybrid Composite Wind Turbine Blade
… finite element analysis (FEA) to evaluate the structural strength. The designed structural strength and stiffness are demonstrated to withstand the loads due to harmonic excitation from rotor rotation. An MDO process for obtaining an optimum hybrid composite laminate layup and an optimum length …
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High porosity electrospun scaffolds for small diameter vascular graft applications
… characteristics while maintaining sufficient structural strength to resist deformation during implantation. Scaffolds were subsequently covalently grafted with heparin, a known anti-coagulant with growth-factor binding properties.
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Residual Compressive Strength Prediction of Carbon/Epoxy Laminates Subjected to Low Velocity Impact Damage
… and can have profound effects on compressive strengths. Low energy impact damage is sometimes termed as barely visible impact damage (BVID). Detecting BVID is only possible by implementing nondestructive testing (NDT) techniques. Depending upon the support conditions, material system, laminate …
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The design, construction, and study of the effect of a cadmium-aluminum shield for the V. P. I. subcritical reactor
… was designed and constructed. Aluminum provides structural strength. Suitable access to fuel and experimental facilities was provided. Experimentally it was determined that the shield is opaque to an influx of thermal neutrons. This is manifested by a depression in neutron density near the …
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The movement of cohesive sediment in a large combined sewer
… techniques were employed to assess the structural strength of the sediment bed present in the study sewer. The results confirmed the apparent cohesive nature of the sediment bed, with the structural strength of the bed far exceeding the normal hydraulic shear stress ranges encountered in …
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Flexure-based nanopositioning systems : integrated design and control
… requirements, such as those dictating structural strength or dynamical behavior. We present performance metrics that allow for the generation of topologies that are tuned for a desired level of structural strength or modal separation. The topology generation is aimed as a valuable …
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An Investigation of Damage Arrestment Devices Application with Fastener/Hole Interaction
… under the face sheet to increase the overall structural strength of the panel and to prevent the propagation of failure along the hole. This was supposed to be a quicker and stronger alternative to potted inserts for composite sandwich panels for designer. The manufacturing curing cycle of the …
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The aerodynamic and structural study of flapping wing vehicles
This thesis reports on the aerodynamic and structural study carried out on flapping wings and flapping vehicles. Theoretical and experimental investigation of aerodynamic forces acting on flapping wings in simple harmonic oscillations is undertaken in order to help conduct and optimize the …
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Evaluation of selected airport pavements in New Mexico
… airport pavements based on their functional and structural conditions. The functional conditions of the pavements are evaluated based on the field collected surface distress data and skid resistance. Field collected distress data such as rutting, cracking, and shoving are processed using …
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One size does not fit all : innovation in emergency housing with a focus on Nepal 2015
… safe. The resulting shelter design harnesses the structural strength of the geodesic dome, the simplicity of reciprocal joinery and strong yet lightweight nature of bamboo. The effectiveness of the proposed new design process is demonstrated through checking the resulting shelter design meeting …
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Three dimensionally flocculated proangiogenic microgels for neovascularization
… benzyl trimethyl ammonium chloride). The structural strength of the colloidal gel could be tuned with the zeta potential and volumetric ratios of the oppositely charged microgels. Furthermore, the implantation of the colloidal gel, encapsulating vascular endothelial growth factor, …
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Effect of Hysteresis Type on Drift Capacity for Global Collapse of Moment Frame Structures for Seismic Loads
… levels of response because of degradation in strength and stiffness. To examine the existence and magnitude of this effect, this research aims to: (1) Determine the global collapse capacities of several classes of moment frame buildings under seismic loads. (2) Develop the basis for the …
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Shear wall layout optimization for conceptual design of tall buildings
… wind and seismic loading usually dominates the structural engineering effort; therefore, optimal lateral system design is important for material efficiency. In a shear-wall-based building, the conventional design process starts with an architect generating a floor plan, which is then passed to a …
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Design, Fabrication, and Experimental Investigation of an Additively Manufactured Flat Plate Heat Pipe
… and internal support pillars to improve the structural strength of the heat pipe were provided in order to overcome the manufacturing constraints. The heat pipe was experimentally characterized for thermal performance with acetone as the working fluid for two different power inputs. The heat …
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Comparative Energy Efficiency Analysis for Hydrogen and Jet Fuel in Next-Generation Long-Haul Aircraft
… with respect to aircraft design range, material structural strength, and engine performance. This study shows that hydrogen-powered aircraft require roughly 2% less fuel energy at the design mission than conventional jet fuel aircraft. However, hydrogen-powered aircraft require approximately …
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A Hydrodynamic Analysis and Conceptual Design Study for an External Storage Enclosure System for Unmanned Underwater Vehicles.
… Fluid Dynamics via model towing resistance. Structural strength was determined by Finite Element Analysis.
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Mechanical and Electromagnetic Optimization of Structurally Embedded Waveguide Antennas
… to obtain a balance between EM performance and structural strength. This optimized waveguide is then used to create a SWASS array of approximately the same size as an aircraft wing panel using the multi-fidelity modeling method that is proposed. This model is compared to a typical conventional …
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