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Dive into the research topics where John Howard Tripp is active.

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Featured researches published by John Howard Tripp.


Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | 2001

Influence of surface topography on friction, film breakdown and running-in in the mixed lubrication regime

Pieter Martin Lugt; R.W.M. Severt; J. Fogelström; John Howard Tripp

Abstract The influence of surface topography on the lubricant film build-up ability and the friction characteristics of potential rolling bearing surfaces has been investigated by experiments on two-disc rigs. Traction-friction torque measurements were made for a variety of surface combinations, together with measurement of the electrical resistance between the discs as an indication of surface separation. For all disc combinations, running-in of the surfaces under load at any slide-roll ratio led eventually to full film separation. Contrary to results reported in the literature, film breakdown did not always increase with slip but depended on certain aspects of the surface structure. Friction torque measurements in the mixed lubrication regime also confirmed that friction is not determined simply by an Ra value. By suitable modification of the surface topography, keeping Ra constant, friction can be varied by as much as 10 per cent.


Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | 2000

Amplitude reduction of waviness in elastohydrodynamic lubrication using an Eyring fluid model

B.C. Jacod; Pieter Martin Lugt; Marie-Laure Dumont; John Howard Tripp; Cornelis H. Venner

Abstract This paper presents a first extension of the amplitude reduction approach, where the deformation of harmonic components of the roughness is considered, to non-Newtonian elastohydrodynamic lubrication (EHL) line contact. The amplitude reduction of one-sided waviness is computed as a function of the slide-roll ratio. Non-Newtonian effects result in an increase in the deformation for positive slide-roll ratios. This contrasts with published results using a Newtonian fluid where the deformation decreased for such conditions. Moreover, the amplitude reduction varies significantly throughout the contact, requiring an additional parameter for the characterization of the amplitude reduction. An explanation of these differences based on the velocity profile of the lubricant inside the contact concludes the paper.


Archive | 1998

Rolling element bearing with improved rolling contact surfaces

Alexander Jan Carel De Vries; Arimin Herbert Emil August Olschewski; John Howard Tripp; Pieter Martin Lugt


Proceedings of the International Tribology Conference | 2001

The determination of changes in surface topography using image processing techniques

J.W. Sloetjes; Dirk J. Schipper; Pieter Martin Lugt; John Howard Tripp; Kazunori Ichimar


Archive | 2001

Rolling element bearing having starved lubrication conditions

Pieter Martin Lugt; Eusthatios Ioannides; Ingrid Victoria Wikström; John Howard Tripp; Marie-Laure Dumont; Antonio Gabelli; B.C. Jacod


Archive | 2002

Method of manufacturing a rolling element bearing with improved rolling contact surfaces

Alexander Jan Carel De Vries; Armin Olschewski; John Howard Tripp; Pieter Martin Lugt


Archive | 2004

Bearing with Reduced Reflow

Pieter Martin Lugt; John Howard Tripp


Archive | 2001

Method for finishing the surface of a rolling contact component

Pieter Martin Lugt; John Howard Tripp; Rinke Vos; Ralph Cornelis Petrus Meeuwenoord; Armin Olschewski; Antonio Gabelli; John Michael Beswick; Arend Pieter Voskamp; Aidan Michael Kerrigan; Alexander Jan Carel De Vries; Johannes Cornelis Kuijpers; Eustathios Ioannides


STLE/ASME International Joint Tribology Conference | 2001

Effects of surface micro-geometry on the lift-off speed of an EHL contact

Marc Arthur Masen; Cornelis H. Venner; Pieter Martin Lugt; John Howard Tripp


Archive | 2001

Roulement a elements roulants a lubrification maigre

Pieter Martin Lugt; Eusthatios Ioannides; Ingrid Victoria Wikström; John Howard Tripp; Marie-Laure Dumont; Antonio Gabelli; B.C. Jacod

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Antonio Gabelli

Institut national des sciences Appliquées de Lyon

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