Imperial College London

DrRichardSayles

Faculty of EngineeringDepartment of Mechanical Engineering

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 7065r.sayles

 
 
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Location

 

692City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

54 results found

Underwood RJ, Zografos A, Sayles RS, Hart A, Cann Pet al., 2012, Edge loading in metal-on-metal hips: low clearance is a new risk factor, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 226, Pages: 217-226, ISSN: 0954-4119

Journal article

Nikas GK, Sayles RS, 2009, Surface coatings and finite-element analysis of layered fretting contacts, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 223, Pages: 159-181, ISSN: 1350-6501

Journal article

Nikas GK, Sayles RS, 2008, Finite-element analysis of layered rolling contacts, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 222, Pages: 865-886, ISSN: 1350-6501

Journal article

Nikas GK, Sayles RS, 2008, A study of lubrication mechanisms using two-phase fluids with porous bearing materials, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 222, Pages: 771-783, ISSN: 1350-6501

Journal article

Kadiric A, Sayles RS, Ioannides E, 2008, Thermo-mechanical model for moving layered rough surface contacts, Journal of Tribology-Transactions of the Asme, Vol: 130, ISSN: 1528-8897

A numerical model designed to simulate a moving line contact of two rough layered bodies is presented. Fourier transforms are used to obtain fundamental solutions to relevant differential equations and then these solutions are used as kernel functions in a numerical scheme designed to provide a full thermomechanical solution for real layered contacts. The model assumes steady state heat transfer and predicts contact pressures and deformations, contact temperature rise, and resulting thermal stresses. The heat division between the contacting components is fully accounted for, as are the interactions between the mechanical and thermal displacements. Some results are presented to illustrate the potential importance of a full thermomechanical analysis as compared to a purely mechanical one as well as to demonstrate the influence of coating properties and surface roughness structure on the contact temperatures.

Journal article

Nikas GK, Burridge G, Sayles RS, 2007, Modelling and optimization of rotary vane seals, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 221, Pages: 699-715, ISSN: 1350-6501

Journal article

Nikas GK, Sayles RS, 2006, Study of leakage and friction of flexible seals for steady motion via a numerical approximation method, TRIBOLOGY INTERNATIONAL, Vol: 39, Pages: 921-936, ISSN: 0301-679X

Journal article

Nikas GK, Sayles RS, 2006, Computational model of tandem rectangular elastomeric seals for reciprocating motion, TRIBOLOGY INTERNATIONAL, Vol: 39, Pages: 622-634, ISSN: 0301-679X

Journal article

Nikas GK, Sayles RS, 2006, Modelling and optimization of composite rectangular reciprocating seals, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 220, Pages: 395-412, ISSN: 1350-6501

Journal article

Kondo S, Sayles RS, Lowe MJS, 2006, A combined optical-ultrasonic method of establishing the compressibility of high-pressure oil and grease films entrapped in a ball on flat contact, JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 128, Pages: 155-167, ISSN: 0742-4787

Journal article

Nikas GK, Sayles RS, 2004, Nonlinear elasticity of rectangular elastomeric seals and its effect on elastohydrodynamic numerical analysis, TRIBOLOGY INTERNATIONAL, Vol: 37, Pages: 651-660, ISSN: 0301-679X

Journal article

Sayles RS, Kondo S, 2004, A study of the compressibility and glass-transition behaviour of high-pressure oil and grease films trapped between a steel ball and a sapphire plate, NORDTRIB 2004

Conference paper

Rana A, Sayles RS, 2004, An experimental study on the friction behaviour of aircraft hydraulic actuator elastomeric reciprocating seals, 29th Leeds-Lyon symposium on tribology, Leeds, September 2004

Conference paper

Kadiric A, Sayles RS, Zhou XB, Ioannides Eet al., 2003, A numerical study of the contact mechanics and sub-surface stress effects experienced over a range of machined surface coatings in rough surface contacts, JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 125, Pages: 720-730, ISSN: 0742-4787

Journal article

Sayles RS, 2001, How two- and three-dimensional surface metrology data are being used to improve the tribological performance and life of some common machine elements, TRIBOLOGY INTERNATIONAL, Vol: 34, Pages: 299-305, ISSN: 0301-679X

Journal article

Rana A, Sayles RS, Nikas G, Jalisi Iet al., 2001, An experimental technique for investigating the sealing principles of reciprocating elastomeric seals for use in linear hydraulic actuator assemblies, Austria, Proceedings of the 2nd world tribology congress, Vienna, 2001, Publisher: The Austrian Tribology Society, Pages: 172-172

Conference paper

Kadiric A, Jalisi ISZ, Sayles RS, Makino Tet al., 2000, Influence of entrapped fluid in rough surface contacts, Proceedings of the International Tribology Conference Nagasaki 2000, Pages: 283-288

Conference paper

Sayles RS, 2000, A case study of cylinder-liner wear in relation to 'varnish' films in a large long-stroke marine diesel engine, SAE technical paper, Vol: 2000-01-1783, ISSN: 0148-7191

Journal article

Lee-Prudhoe I, Sayles RS, Kadiric A, 1999, Investigations into asperity persistence in heavily loaded contacts, Journal of Tribology-Transactions of the ASME, Vol: 121, Pages: 441-448, ISSN: 0742-4787

Journal article

Sayles RS, Ioannides E, 1999, Lubrication system, W0 99/66222

Patent

Nikas GK, Sayles RS, Ioannides E, 1999, Thermoelastic distortion of EHD line contacts during the passage of soft debris particles, Transactions of the ASME Journal of Tribology, Vol: 121, Pages: 265-271, ISSN: 0742-4787

Journal article

Nikas GK, Ioannides E, Sayles RS, 1999, Thermal modeling and effects from debris particles in sliding/rolling EHD line contacts - A possible local scuffing mode, Transactions of the ASME Journal of Tribology, Vol: 121, Pages: 272-281, ISSN: 0742-4787

Journal article

Makino T, Sayles RS, 1999, A simplified diagram of seizure criteria for lubricated sliding rough surfaces, Transactions of the ASME Journal of Tribology, Vol: 121, Pages: 655-660, ISSN: 0742-4787

Journal article

Sayles RS, Ioannides E, 1998, Lubrication system

Patent

Lee-Prudhoe I, Starkey MS, Sayles RS, 1998, Observations of frictional behaviour of MoS2 and dependence on surface roughness orientation, Tribology for energy conservation: proceedings of the 24th Leeds-Lyon symposium on tribology London 4-6 September 1997, Publisher: Elsevier, Pages: 129-137

Conference paper

Nikas GK, Sayles RS, Ioannides E, 1998, Effects of debris particles in sliding/rolling elastohydrodynamic contacts, Proceedings of the Institution of Mechanical Engineers Part J-Journal of Engineering Tribology, Vol: 212, Pages: 333-343, ISSN: 1350-6501

Journal article

Sayles RS, Ioannides E, 1998, Cage lubrication, NL 98014

Patent

Hamilton RW, Sayles RS, Ioannides E, 1998, Wear due to debris particles in rolling bearing contacts, Proceedings of the 24th Leeds/Lyon Symposium on Tribology: Tribology for energy conservation, Publisher: Elsevier, Pages: 87-93

Conference paper

Sayles RS, Lee-Prudhoe I, Bouvet C, 1997, Some aspects of the contact mechanics and lubrication of low modulus materials in rough interfaces, Elastohydrodynamics '96, Editors: Dowson, Publisher: Elsevier, Pages: 209-217, ISBN: 9780444828095

Book chapter

Rutlin HC, Sayles RS, Starkey MS, 1997, An optical ehd study using a reciprocating Hertzian contact rig designed to simulate the kinematics of constant velocity joints, Elastohydrodynamics '96, Editors: Dowson, Publisher: Elsevier, Pages: 297-303, ISBN: 9780444828095

Book chapter

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