Journal
TRIBOLOGY LETTERS
Volume 48, Issue 1, Pages 11-25Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-012-9913-z
Keywords
Boundary lubrication; Nanotribology; Viscosity; Master equation; Stick-slip
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Funding
- CNRS-Ukraine PICS grant [5421]
- ESF Eurocore FANAS AFRI through CNR-Italy
- PRIN/COFIN [20087NX9Y7]
- SNF Sinergia Project [NPA1617]
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We discussed the role of the long-range elastic interaction between the contacts inside an inhomogeneous frictional interface. The interaction produces a characteristic elastic correlation length lambda(c) = a (2) E/k (c) (where a is the distance between the contacts, k (c) is the elastic constant of a contact, and E is the Young modulus of the sliding body), below which the slider may be considered as a rigid body. The strong inter-contact interaction leads to a narrowing of the effective threshold distribution for contact breaking and enhances the chances for an elastic instability to appear. Above the correlation length, r > lambda(c), the interaction leads to screening of local perturbations in the interface, or to appearance of collective modes-frictional cracks propagating as solitary waves.
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