Eur. Phys. J. E 8, 331-337 (2002)
DOI: 10.1140/epje/i2002-10017-1
Rheological aging and rejuvenation in solid friction contacts
L. Bureau, T. Baumberger and C. CaroliGroupe de Physique des Solides (UMR 7588), Universités Paris 6 & 7, 2 place Jussieu, 75251 Paris Cedex 05, France bureau@gps.jussieu.fr
(Received 20 February 2002 and Received in final form 16 May 2002)
Abstract
We study the low-velocity (0.1-100
m s
-1) frictional
properties of interfaces between a rough glassy polymer and smooth
silanized glass, a configuration which gives direct access to the
rheology of the adhesive joints in which shear localizes. We show that
these joints exhibit the full phenomenology expected for confined
quasi-2D soft glasses: they strengthen logarithmically when aging at
rest, and weaken (rejuvenate) when sliding. Rejuvenation is found to
saturate at large velocities. Moreover, aging at rest is shown to be
strongly accelerated when waiting under finite stress below the static
threshold.
61.20.Lc - Time-dependent properties; relaxation.
62.20.Fe - Deformation and plasticity (including yield, ductility, and superplasticity).
81.40.Pq - Friction, lubrication, and wear.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2002
