172 research outputs found
Development of porous ceramic air bearings
Porous air bearings enjoy some important advantages over conventional air
bearing types such as increased load carrying capacity, higher stiffness and
improved damping. However, these types of bearings have yet to find
widespread acceptance due to problems with obtaining materials with
consistent permeability, instability issues relating to the volume of gas trapped
at the bearing surface in the pores, and manufacturing the bearing without
altering the permeability.
Using a series of fine grades of alumina powder to minimise surface pore
volume it has been demonstrated that it is possible to consistently and
reproducibly manufacture porous bearings by injection moulding and slip
casting. The relationship between powder size, processing conditions, porosity,
mechanical properties and fluid flow characteristics were experimentally
determined. The temperature of processing and the green density were found
to be the controlling parameters in the resulting fluid flow properties for a
given powder size,
Test bearings were produced from the range of processing conditions
investigated. It was found that the fine powder size bearings were stable over
the entire range of test conditions irrespective of their initial manufacturing
route. The most important consideration for the bearing performance was the
quality of manufacture. The bearings were found to be sensitive to the flatness
of their working surface and quality of fit in their test holder.
The bearings were compared with published theories for load capacity and
stiffness. A reasonable agreement was found with load carrying capacity once a
correction for surface roughness was incorporated. Stiffness predictions
provided a useful tool for the analysis and prediction of properties such as
optimum values of permeability for a given geometry, if certain allowances are
made
Fabricate 2020
Fabricate 2020 is the fourth title in the FABRICATE series on the theme of digital fabrication and published in conjunction with a triennial conference (London, April 2020). The book features cutting-edge built projects and work-in-progress from both academia and practice. It brings together pioneers in design and making from across the fields of architecture, construction, engineering, manufacturing, materials technology and computation. Fabricate 2020 includes 32 illustrated articles punctuated by four conversations between world-leading experts from design to engineering, discussing themes such as drawing-to-production, behavioural composites, robotic assembly, and digital craft
Flexible Automation and Intelligent Manufacturing: The Human-Data-Technology Nexus
This is an open access book. It gathers the first volume of the proceedings of the 31st edition of the International Conference on Flexible Automation and Intelligent Manufacturing, FAIM 2022, held on June 19 – 23, 2022, in Detroit, Michigan, USA. Covering four thematic areas including Manufacturing Processes, Machine Tools, Manufacturing Systems, and Enabling Technologies, it reports on advanced manufacturing processes, and innovative materials for 3D printing, applications of machine learning, artificial intelligence and mixed reality in various production sectors, as well as important issues in human-robot collaboration, including methods for improving safety. Contributions also cover strategies to improve quality control, supply chain management and training in the manufacturing industry, and methods supporting circular supply chain and sustainable manufacturing. All in all, this book provides academicians, engineers and professionals with extensive information on both scientific and industrial advances in the converging fields of manufacturing, production, and automation
Flexible Automation and Intelligent Manufacturing: The Human-Data-Technology Nexus
This is an open access book. It gathers the first volume of the proceedings of the 31st edition of the International Conference on Flexible Automation and Intelligent Manufacturing, FAIM 2022, held on June 19 – 23, 2022, in Detroit, Michigan, USA. Covering four thematic areas including Manufacturing Processes, Machine Tools, Manufacturing Systems, and Enabling Technologies, it reports on advanced manufacturing processes, and innovative materials for 3D printing, applications of machine learning, artificial intelligence and mixed reality in various production sectors, as well as important issues in human-robot collaboration, including methods for improving safety. Contributions also cover strategies to improve quality control, supply chain management and training in the manufacturing industry, and methods supporting circular supply chain and sustainable manufacturing. All in all, this book provides academicians, engineers and professionals with extensive information on both scientific and industrial advances in the converging fields of manufacturing, production, and automation
NAS Technical Summaries, March 1993 - February 1994
NASA created the Numerical Aerodynamic Simulation (NAS) Program in 1987 to focus resources on solving critical problems in aeroscience and related disciplines by utilizing the power of the most advanced supercomputers available. The NAS Program provides scientists with the necessary computing power to solve today's most demanding computational fluid dynamics problems and serves as a pathfinder in integrating leading-edge supercomputing technologies, thus benefitting other supercomputer centers in government and industry. The 1993-94 operational year concluded with 448 high-speed processor projects and 95 parallel projects representing NASA, the Department of Defense, other government agencies, private industry, and universities. This document provides a glimpse at some of the significant scientific results for the year
Aeronautical engineering: A special bibliography with indexes, supplement 38, December 1973
This special bibliography lists 473 reports, articles, and other documents introduced into the NASA scientific and technical information system in November 1973
LIPIcs, Volume 274, ESA 2023, Complete Volume
LIPIcs, Volume 274, ESA 2023, Complete Volum
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