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.
Results
Showing 1 to 11 of 11 for “"Material limits"”.
-
Residual stress measurement and structural integrity evaluation of SLM Ti-6Al-4V
… performance envelope requirements and the material limits. The most advanced turbine engines are incredibly complex in design and the weight-saving requirements have placed significant pressure on material capabilities and the manufacturing systems. The next generation of manufacturing …
-
Feasibility Study on Highly Slender Circular Concrete Filled Tubes Under Axial Compression
… and steel technology, the usage of high strength materials in these concrete filled tubes is increasing. The governing American specification (AISC 360-16) classifies these composite members as compact, non-compact and slender sections. The allowed section slenderness (ratio of diameter to …
-
Design Considerations for High Surface-Speed and High-Load Switched Reluctance Machines
… sustain mechanical stresses near the rotor core material limits. The method begins by using common application specifications to identify the maximum diameter and length of a rotor through a series of structural analyses. Maximizing rotor diameter and axial length enables designers to evaluate a …
-
Monasticism and its limits: rematerialising monastic space in early medieval Ireland
… context for early Irish monasticism, so as to ‘rematerialise’ a phenomenon that has been neglected by recent archaeological scholarship. Following revision of earlier models of the early Irish Church, archaeologists are now faced with redefining monasticism and distinguishing it from other diverse …
-
Límites materiales al poder de reforma, enmiendas a la Constitución de 1991 y originalismo orgánico
La creación del control de constitucionalidad por vicios de competencia vía jurisprudencia, en clara contravía del artículo 241 de la Constitución, pone de presente la necesidad de fortalecer los límites competenciales que la Carta establece para las autoridades judiciales, para lo cual se propone …
-
Let there be (more) light : a study of tungsten based 2D semiconductor-plasmonic hybrid structures
… dichalcogenides (TMDs) have emerged as promising materials for optoelectronic applications due to their transition from an indirect to a direct (or nearly direct) band gap when reduced to a single layer thickness; this transition is accompanied by a dramatic increase in light absorption and …
-
Finite Element Analysis of Super Elastomer Mechanical Behavior and Failure for High Pressure Sealing Applications
… significant. Such applications often push the material limits and challenge product designs. This study investigates the mechanical performances of rubber-based elastomer sealing packers used in hydraulic fracturing plugs. Packers are expected to sustain a 70MPa pressure difference, keep sealed …
-
Experimental Evaluation of Medium-Voltage Cascode Gallium Nitride (GaN) Devices for Bidirectional DC–DC Converters
… which are reaching their theoretical and material limits as there is an insignificant possibility for further improvements. Wide bandgap (WBG) semiconductors, such as gallium nitride (GaN) and silicon carbide (SiC), exhibit superior physical properties and demonstrate great potential for …
-
Kinetics of gelation in photoreversible gels
Smart materials, or materials that respond to some stimulus by changing their properties, make up an active area of research in many fields. Light can be considered an especially attractive choice of stimulus because it can be applied with precise spatial and temporal control, and is non-invasive. …
-
Low temperature glide cycles for energy storage applications: Thermodynamic and capital cost analysis
… Advantages include the use of abundant and cheap materials, conventional components from the power industry, as well as full flexibility in siting. Various thermodynamic cycles can be used for the energy conversion, including the Joule-Brayton, transcritical, and glide (also known as Kalina) …
-
Nondestructive Evaluation Of Thermal Barrier Coatings With Thermal Wave Imaging And Photostimulated Luminescence Spectroscopy
… One method of increasing the temperature beyond material limits is by applying thermal barrier coatings (TBCs) to hot section components. TBCs provide a thermal gradient between the hot gases and metallic substrate, and allow an increase in turbine inlet temperatures of 100-150ºC. However, …