Mechanical brakes are acting not stochastically but surprisingly determined
as the presented results measured on industrial brake systems will show. T
hey help understanding these complex friction systems. An important mechani
sm is thereby the periodically change of the local friction intensity durin
g the continuous friction process. Another essential influence on the frict
ion properties are the metal particles that originate from the drum or disk
and diffuse into the organically bound friction layer. (C) 2001 Elsevier S
cience B.V. All rights reserved.