
221From Frictional Instabilities to Friction-Induced Self-Organization
disk material and affects the reproducibility of the brake test results. A larger
number of spots is desirable for better reproducibility. It can be achieved by
decreasing the thermal diffusivity (although this approach comes in conict
with the need of high dissipation rates), by increasing the disk area, or alterna-
tively, by texturing the surface and dividing it articially into domains.
8.3 Running-In as a Self-Organized Process
8.3.1 Introduction
In this section we study running-in as a friction-induced self-organized pro-
cess in the sense that sliding surfaces adjust to ...