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 154 for “"Material selection"”.
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Underfill material selection for flip chip technology
Six underfill materials were examined for the selection of an appropriate underfill material for Digital Equipment Corporation's flip chip development project. Several tests were performed to determine the material properties, process properties, and the reliability of each underfill material. A …
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Material Selection for an Electric Motor Assisted Stroller
… focus of this report is the process used for material selection for components of an electric motor assisted stroller designed for a senior design project. Both Solidworks’ FEA testing and CES EduPack’s materials database were utilized to gather the necessary data to evaluate both material …
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Material selection and manufacture for a polymer heart valve application
This thesis reports on the material selection, manufacture and testing of a polymer heart valve made entirely from block copolymer. Selection based on Ashby diagrams pointed towards styrene-based and polyurethane-based block copolymers as candidate materials for study. Styrene-based block …
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Material selection and nanofabrication techniques for electronic photonic integrated circuits
… using SiNx and Si as the high -index core materials. By controlling the electron-beam-exposure dose it is possible to change the average microring-waveguide width to a precision better than 75 pm, despite the 6 nm SEBL address grid. Using postfabrication tuning the remaining …
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Data synthesis : a comprehensive visual approach to material selection in architecture
… would allow a designer to visualize not only material qualities and behavior characteristics, but provide the means to distill, organize, and select relevant data. Material databases and the enabling power of the internet can only be exploited as "information providers" for designers when such …
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A life cycle assessment method for alternative material selection strategies in boat structures
… social and economic benefits of using composite materials have made users complacent about the pollution and the health and safety issues associated with these materials. As the perception of environmental problems changes with time, alternatives with lower emissions allowing for cleaner …
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Recycled material selection for affordable and sustainable homes using large scale additive manufacturing
… which is often driven heavily by the cost of materials required. Plastic waste is also at an all-time high, with over 5 billion tons of plastic on the earth's surface and in its oceans. This waste will take hundreds of years to degrade if not longer and incentives and use for recycled plastic …
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Methods for managing uncertainly in material selection decisions : robustness of early stage life cycle assessment
Utilizing alternative materials is an important tactic to improve the environmental performance of products. Currently a growing array of materials candidates confronts today's product designer. While life-cycle assessment (LCA) methods provide quantitative input into this selection decision, their …
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The Effect of Temperature on the Material Stiffness of Field Hockey Balls for Material Selection
It is well known that temperature affects the material properties of polyvinyl chloride (PVC). In particular, field hockey players report balls made of PVC breaking in half when hit in cold weather. Hockey ball manufacturers are interested in the effect of temperature on balls breaking to inform …
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Polymer material selection and testing of resistive wire arrangement for a transparent infant warming blanket
The ThermoCloud was designed as a portable, scalable, transparent electrical blanket to warm and insulate infants, while permitting hassle-free medical transportation and maximum visualization of a patient's thorax and extremities, without removing the blanket. The blanket consists of a resistive …
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Rethinking low-cost green building material selection process in the design of low-impact green housing developments
… in the effective use of low-cost green building materials and components (LCGBMCs),primarily because of their potential to conserve energy use, reduce life-cycle cost, lessen ecological footprints, and revive lost cultural traditions. Until recently however, only very few of these products have …
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Numerical analysis and material selection of functionally graded pipes based on metals and ceramics for deep offshore oil and gas operations in Gulf of Guinea
… has necessitated the demand for unique materials that could withstand both the loading conditions of the operations and the corrosion resistance. The work presented herein has explored the use of Functionally Graded Material (FGM) to validate its ability to proffer solutions to deep …
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Light-weight materials selection for high-speed naval craft
… analysis study was conducted on the process of materials selection for high-speed naval craft using the Modified Digital Logic (MDL) method proposed by B. Dehgham-Manshadi et al in ref [17]. The purpose is to show how this method along with Ashby's material selection process can be integrated to …
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Characterization of thermal dissipation within integrated gate bipolar transistor (IGBT) layered packaging structure
… operational boundaries. Traditionally, the selection of materials for the layered structure has been largely influenced by the thermal conductivity for heat dissipation, the similarity of the coefficient of thermal expansion for physical integrity of the structure and to a lesser extent, the …
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Influence of hot melt extrusion processing parameters on the properties of a pharmaceutical formulation
… product quality such as processing parameters, material selection, material ratio, and the presence of gas or moisture. One aim of this study is to find the most significant factor that affects the product properties using the simplest design of experiment. Material selection and the ratio …
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Application of stiffness geometries in the lightweight design and optimization of automotive monolithic deep-drawn hard-shell rooftops
… was developed to integrate geometric design, material selection, parametric optimization, numerical simulation and manufacturing feasibility within a unified approach. The monolithic hard-shell rooftop CAD model was developed alongside a decision support system that guided the material …
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Development Of Thermally Processed Nanocomposites With Controlled Surfaces
… of inexpensive, light weight and high strength materials which are able to meet the high standards and specifications for various engineering applications. The intention of this work is to show that the suitable material selection and the utilization of plasma spray processing can be of …
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