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Dynamics of sliding in a spring-block experiment

Authors
Journal
Wear
0043-1648
Publisher
Elsevier
Publication Date
Volume
172
Issue
1
Identifiers
DOI: 10.1016/0043-1648(94)90304-2
Disciplines
  • Mathematics

Abstract

Abstract An experiment has been performed to investigate the intermittent motion of a simple spring-block setup. We show that in the limit of continuous sliding the measured power spectrum of the block position is surprisingly well described by a simple Langevin equation for a harmonic oscillator. Furthermore, we investigate the correlations in characteristics of the motion and find strong correlations in the “sticking”, whereas we find much weaker correlations in the “slipping”. For stick-slip motion the interpretation is that the static friction is governed by local surface properties, whereas the dynamic friction is largely a stochastic process.

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