Friction fluctuations and friction memory in stick-slip motion

A. Levent Demirel, Steve Granick

Research output: Contribution to journalArticlepeer-review


We demonstrate that friction is not always an exact number. In a simple lubricated system (atomically smooth mica separated by molecularly thin films of squalane), sinusoidal shear forces were applied for millions of cycles. The kinetic friction increased steadily over repetitive cycles and collapsed intermittently to the average value. Individual slip cycles also consisted of a cascade of smaller slip events. The distribution of fluctuation size and duration followed a power law.

Original languageEnglish (US)
Pages (from-to)4330-4333
Number of pages4
JournalPhysical review letters
Issue number21
StatePublished - 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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