Rheological aging and rejuvenation in solid friction contacts

Details Rheological aging and rejuvenation in solid friction contacts Rheological aging and rejuvenation in solid friction contacts

2002-02-14

arxiv.org/abs/cond-mat/0202245v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1140/epje/i2002-10017-1

We study the low-velocity (0.1--100 $\mu$m.s$^{-1}$) frictional properties of interfaces between a rough glassy polymers 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.

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