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• W2513516774 abstract "The work is devoted to modelling of dry sliding friction between contacting surfacesand related problems of contact mechanics. To limit the number of physicalphenomena involved, the studies are targeted to systems used in vacuum conditions,hence there is no need to consider environmental parameters, such as humidity oroxidation films. Although friction has been studied over many years, challengesremain for obtaining a comprehensive understanding and a quantitative description ofinfluence of nanometre scale effects on friction at micro/macro levels. Many existingmodels are critically re-examined using ideas of nanoscience.The studies start from the classic Zhuravlev model well-known as the Greenwood -Williamson model representing rough surfaces as collections of spherical elasticasperities. Contact problems for bodies of various shapes are investigated using theGalin solution along with the Borodich rescaling formulae. The rescaling method isapplied to indentation experiments by spherical and nominally sharp punches and thena way to model dry friction following Zhuravlev’s arguments is outlined.New ways for numerical simulations of dry sliding friction are presented assuming thefriction force is defined by the total energy dissipated over the sliding distance. Novelhierarchical, multiscale, multilevel structural models for simulation of sliding dryfriction are presented. The models reflect the physical mechanisms which are mostrelevant to dry friction at the specific length scales: the chemical interactions at theatomic scale, the adhesive (van der Waals) interactions at the nanoscale, and themechanical interlocking of asperities and their coupling at the micro and macroscales.Although the models include some features of known models, the nanotribologicalinterpretation of the features is novel. It is argued that the nano-asperities do notdeform plastically due to the so-called Polonsky-Keer effect. The obtained results arein good agreement with the experimental observations found in literature." @default.
• W2513516774 created "2016-09-16" @default.
• W2513516774 creator A5088732925 @default.
• W2513516774 date "2016-01-01" @default.
• W2513516774 modified "2023-09-23" @default.
• W2513516774 title "Simulations of dry friction between rough surfaces andcorresponding nonlinear problems at nano andmicroscales" @default.
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