INTRODUCTION
The 29 th Leeds-Lyon Symposium on Tribology was held at Bodington Hall in Leeds under the
title "Tribological Research and Design for Engineering Systems" from Tuesday 3 rd
September until Friday 6 th September 2002. This was the first Leeds-Lyon meeting of the 21 st
century to be held in Leeds and once again terrific support was received from the tribological
community. The attendance was excellent with 137 delegates from 18 countries reflecting the
true international status of the Symposium. Paperswere presented in 22 sessions, many
parallel, and for the first time in Leeds computer-based projection facilities were made
available in all presentation rooms.
There have been spectacular advances in understanding in the field of tribology in recent
years. Progress has been made in relation to the engineering and interaction of surfaces,
micro- and nano-tribology, elastohydrodynamics, surface films, surface texture,
tribochemistry, wear and life prediction, with both experimental and theoretical contributions.
This Symposium presented an opportunity to review these advances and to consider the
impact of this new understanding of fundamentals upon total engineering activity embracing
design, manufacture and the efficient and reliable operation of machinery.
no longer considered as a global value valid
for the whole contact area. A local value is in-
troduced instead, which evolution is governed by
the local history of the contact and the amount of
slip. The framework is inspired from elastoplas-
ticity. The evolution of the COF depends on two
variables: an isotropic evolution related to cumu-
lated slip and a kinematic compone
INTRODUCTION The 29 th Leeds-Lyon Symposium on Tribology was held at Bodington Hall in Leeds under the title "Tribological Research and Design for Engineering Systems" from Tuesday 3 rd September until Friday 6 th September 2002. This was the first Leeds-Lyon meeting of the 21 st century to be held in Leeds and once again terrific support was received from the tribological community. The attendance was excellent with 137 delegates from 18 countries reflecting the true international status of the Symposium. Paperswere presented in 22 sessions, many parallel, and for the first time in Leeds computer-based projection facilities were made available in all presentation rooms. There have been spectacular advances in understanding in the field of tribology in recent years. Progress has been made in relation to the engineering and interaction of surfaces, micro- and nano-tribology, elastohydrodynamics, surface films, surface texture, tribochemistry, wear and life prediction, with both experimental and theoretical contributions. This Symposium presented an opportunity to review these advances and to consider the impact of this new understanding of fundamentals upon total engineering activity embracing design, manufacture and the efficient and reliable operation of machinery.no longer considered as a global value valid for the whole contact area. A local value is in- troduced instead, which evolution is governed by the local history of the contact and the amount of slip. The framework is inspired from elastoplas- ticity. The evolution of the COF depends on two variables: an isotropic evolution related to cumu- lated slip and a kinematic compone
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