Browsing by Author "Corbett, John"

Browsing by Author "Corbett, John"

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  • Controlled porosity alumina structures for ultra-precision hydrostatic journal bearings 
    Durazo-Cardenas, Isidro; Stephenson, David J.; Corbett, John (Blackwell Publishing Ltd., 2010-11-04)
    A series of fine-grade alumina powders has been used in combination with maize starch granules to produce porous structures for porous hydrostatic journal- bearing applications. A comprehensive series of tests was conducted ...
  • Controlled porosity alumina structures for ultra-precision hydrostatic journal bearings 
    Durazo-Cardenas, Isidro; Stephenson, D. J.; Corbett, John (American Ceramic Society, 2010-11-04)
    A series of fine grade alumina powders has been used in combination with maize starch granules to produce porous structures for porous hydrostatic journal bearing applications. A comprehensive series of tests was conducted ...
  • Critical study of high efficiency deep grinding 
    Johnstone, lain (Cranfield University, 2002)
    The recent years, the aerospace industry in particular has embraced and actively pursued the development of stronger high performance materials, namely nickel based superalloys and hardwearing steels. This has resulted ...
  • A design methodology for jigless aerospace manufacture 
    Burley, Graham John (2005-03)
    Between 10% and 40% of the overall cost of an aerostructure can be directly attributed to the cost of type specific, hard-tooling. Hence, any attempt to reduce the cost of aerostructure must eventually focus on reducing ...
  • Designing a Turbine Blade Cooling System Using a Generalised Regression Genetic Algorithm 
    Roy, Rajkumar; Tiwari, Ashutosh; Corbett, John (Technische Rundschau, Hallwag Publishers; 1999, 2003-01-01)
    The design of a turbine blade cooling system is a multi-objective optimisation problem involving constraints and complex interaction among its design variables. The aim of this paper is to develop a methodology to optimise ...
  • The development of a porous ceramic water hydrostatic bearing for ultra high precision applications 
    Almond , R. J. (Cranfield University, 1999-12)
    The principal objective of this research was to produce a series of extremely stiff and thermally stable porous ceramic bearings, and to expand the performance envelope of fluid film technology beyond that currently ...
  • Development of porous ceramic air bearings 
    Roach, Christopher James (Cranfield University, 2001-02)
    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 ...
  • Development of porous-ceramic hydrostatic bearings 
    Durazo-Cardenas, Isidro (Cranfield University, 2003-10)
    Porous-ceramic hydrostatic bearings have been recently developed. These bearings have demonstrated an exceptional overall performance when compared with conventional technology bearings. However, despite all the benefits, ...
  • Enhanced surface finishing of bearing raceways 
    Knight, Peter (2000-10)
    Bearing surfaces are highly engineered and high precision parts in regard to surface finish, waviness, form and dimensional size. Surface finishing techniques will not only affect the surface finish and texture but the ...
  • Feature based design for jigless assembly 
    Naing, Soe (Cranfield University, 2004-06)
    The work presented in this thesis was undertaken as part of the three-year ‘Jigless Aerospace Manufacture’ (JAM) project which was set-up to investigate and address the significant scientific, technological and economic ...
  • Grinding processes and their effects on surface integrity 
    Comley, Paul (Cranfield University, 2005-03)
    The introduction of high performance grinding machines in combination with the latest superabrasive technology has the potential to impact significantly on existing process chains. The aim of the research was to look at ...
  • Investigation into the grinding of titanium alloys 
    Wang, S. H. (Cranfield University, 2000-07)
    Titanium alloys are used extensively in the aerospace industry due to their high specific strength and excellent corrosion resistance. However, their poor thermal conductivity and high chemical reactivity with tool ...
  • Jig-Less Assembly for Aerospace Manufacture 
    Snelling, Peter D. (2000)
    Due to the high level of investment required to compete successively in the global aerospace and automotive markets, these industries are forced to form partnerships wherever possible and thereby share their resources ...
  • Machining surfaces of optical quality by hard turning 
    Knuefermann, Markus M. W. (Cranfield UniversitySchool of Industrial and Manufacturing Science, 2003-11)
    The main aim of this work was the machining by hard turning of surfaces with optical surface quality. A numerical target had been set as a surface roughness Ra = 10nm. It has been shown that achieving roughness of that ...
  • Modelling and evaluation of time-varying thermal errors in machine tool elements 
    Gim, Taeweon (Cranfield University, 1997-04)
    This thesis addresses a comprehensive approach to understanding the time-varying thermal errors in machine tools. Errors in machine tools are generally classified as being time or spatial dependent. Thermal errors are ...
  • Optimisation of the High Efficiency Deep Grinding Process with Fuzzy Fitness Function and Constraints. 
    Jones, Phil; Tiwari, Ashutosh; Roy, Rajkumar; Corbett, John (2004-06-01)
    This paper describes the application of two multi-objective optimisation techniques to the high efficiency deep grinding process. The process is modelled using a fuzzy expert system. This allows understanding gained ...
  • The performance of a porous ceramic hydrostatic journal bearing 
    Durazo-Cardenas, Isidro; Corbett, John; Stephenson, David J. (Professional Engineering Publishing, 2010)
    The performance of a porous-ceramic hydrostatic journal bearing manufactured by the starch consolidation (SC) technique has been examined using a highly instrumented test rig. The results have been compared with those ...
  • Permeability and dynamic elastic moduli of controlled porosity ultra-precision aerostatic structures 
    Durazo-Cardenas, Isidro; Corbett, John; Stephenson, David J. (Elsevier Science B.V., Amsterdam., 2014-03-03)
    Porous ceramic aerostatic bearings enable precise and smooth motion and improved stiffness compared with widely used orifice restrictor bearings. However, the processing techniques so far used are too complex or rely in ...
  • Processing and fluid flow characteristics of hot isostatically pressed porous alumina for aerostatic bearing applications 
    Kwan, Y. B. P (Cranfield University, 1996-12)
    Despite their well known superior load and stiffness characteristics, the wide-spread use of porous aerostatic bearings in preference to other bearing types has been hampered by difficulties in controlling the permeability ...
  • Ultra-precision grinding of PZT ceramics--Surface integrity control and tooling design 
    Arai, S.; Wilson, Stephen A.; Corbett, John; Whatmore, Roger W. (Elsevier, 2009-10)
    A comprehensive statistical analysis of the factors controlling surface quality and form in ultra-precision grinding of polycrystalline lead zirconate titanate (PZT) ceramics has been conducted. The work focuses on practical ...