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- W2976814979 abstract "The real area of contact of a frictional interface changes rapidly when the normal load is altered, and evolves slowly when normal load is held constant, aging over time. Traditionally, the total area of contact is considered a proxy for the frictional strength of the interface. Here we show that the state of a frictional interface is not entirely defined by the total real area of contact but depends on the geometrical nature of that contact as well. We directly visualize an interface between rough elastomers and smooth glass and identify that normal loading and frictional aging evolve the interface differently, even at a single contact level. We introduce a novel protocol wherein the real area of contact is held constant in time. Under these conditions, the interface is continually evolving; small contacts shrink and large contacts coarsen. When the same protocol is applied to an extended PMMA-PMMA frictional system, the static coefficient of friction grows while total area of contact is held constant. This suggests that the observed geometry-dependent evolution of single contacts may apply to a broad class of frictional systems." @default.
- W2976814979 created "2019-10-03" @default.
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- W2976814979 date "2019-09-23" @default.
- W2976814979 modified "2023-09-27" @default.
- W2976814979 title "The State of a Frictional Interface Depends on the Shape of its Microcontacts" @default.
- W2976814979 hasPublicationYear "2019" @default.
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