TY - JOUR
T1 - Slippery but Tough
T2 - The Rapid Fracture of Lubricated Frictional Interfaces
AU - Bayart, E.
AU - Svetlizky, I.
AU - Fineberg, J.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/5/10
Y1 - 2016/5/10
N2 - We study the onset of friction for rough contacting blocks whose interface is coated with a thin lubrication layer. High speed measurements of the real contact area and stress fields near the interface reveal that propagating shear cracks mediate lubricated frictional motion. While lubricants reduce interface resistances, surprisingly they significantly increase the energy dissipated Γ during rupture. Moreover, lubricant viscosity affects the onset of friction but has no effect on Γ. Fracture mechanics provide a new way to view the otherwise hidden complex dynamics of the lubrication layer.
AB - We study the onset of friction for rough contacting blocks whose interface is coated with a thin lubrication layer. High speed measurements of the real contact area and stress fields near the interface reveal that propagating shear cracks mediate lubricated frictional motion. While lubricants reduce interface resistances, surprisingly they significantly increase the energy dissipated Γ during rupture. Moreover, lubricant viscosity affects the onset of friction but has no effect on Γ. Fracture mechanics provide a new way to view the otherwise hidden complex dynamics of the lubrication layer.
UR - http://www.scopus.com/inward/record.url?scp=84969611228&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.116.194301
DO - 10.1103/PhysRevLett.116.194301
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AN - SCOPUS:84969611228
SN - 0031-9007
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
IS - 19
M1 - 194301
ER -