Static friction coefficient is not a material constant

Oded Ben-David*, Jay Fineberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

170 Scopus citations


The static friction coefficient between two materials is considered to be a material constant. We present experiments demonstrating that the ratio of shear to normal force needed to move contacting bodies can, instead, vary systematically with controllable changes in the external loading configuration. Large variations in both the friction coefficient and consequent stress drop are tightly linked to changes in the rupture dynamics of the rough interface separating the two bodies.

Original languageAmerican English
Article number254301
JournalPhysical Review Letters
Issue number25
StatePublished - 20 Jun 2011


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