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Analysis of the discrete contact characteristics based on the Greenwood-Williamson model and the localization principle

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Friction 2024年第5期12卷 1042-1056页

作者： Anastasiya A.YAKOVENKO irina G.goryacheva Ishlinsky Institute for Problems in Mechanics RAS Moscow119526Russia

The contact of a rigid body with nominally flat rough surface and an elastic half-space is *** solve the contact problem,the Greenwood-Williamson statistical model and the localization principle are *** developed contact model allows us to investigate the surface approach and the real contact area with taking into account the asperities *** is shown that the mutual influence of asperities changes not only contact characteristics at the macroscale,but also the contact pressure distribution at the *** follows from the results,the inclusion in the contact model of the effect of the mutual influence of asperities is especially significant for studying the real contact area,as well as the contact characteristics at high applied *** results calculated according to the proposed approach are in a good agreement with the experimentally observed effects,i.e.,the real contact area saturation and the additional compliance exhaustion.

关键词： surface roughness elasticity Greenwood-Williamson model localization principle asperity interaction

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Combined effect of surface microgeometry and adhesion in normal and sliding contacts of elastic bodies

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Friction 2017年第3期5卷 339-350页

作者： irina goryacheva Yulia MAKHOVSKAYA Institute for Problems in Mechanics of the Russian Academy of Sciences Pr.Vernadskogo 101-1 Moscow 119526 Russia

In this study,models are proposed to analyze the combined effect of surface microgeometry and adhesion on the load-distance dependence and energy dissipation in an approach-separation cycle,as well as on the formation and rupture of adhesive bridges during *** models are based on the Maugis-Dugdale approximation in normal and frictional (sliding and rolling) contacts of elastic bodies with regular surface *** the normal adhesive contact of surfaces with regular relief,an analytical solution,which takes into account the mutual effect of asperities,is *** contribution of adhesive hysteresis into the sliding and rolling friction forces is calculated for various values of nominal pressure,parameters of microgeometry,and adhesion.

关键词： adhesion roughness discrete contact rolling friction sliding friction

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Effect of the gap conditions in sliding contact of the periodic punch on the viscoelastic foundation

Effect of the gap conditions in sliding contact of the perio...

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23rd International Congress of Theoretical and Applied Mechanics

作者： irina G goryacheva Julia Yu.Makhovskaya Alexei G.Shpenev Tribology Department Ishlinsky Institute for Problems in Mechanics of Russian Academy of SciencesMoscowRussia

＜正＞Surface microgeometry has the significant effect in sliding contact of viscoelastic *** cyclic deformation of the contacting bodies in sliding causes the hysteretic losses in the material and leads to the fricti...

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Micromineralogy of ＂Black Shale＂ Disseminated- Sulphide Gold Ore Deposits of the Ayan-Yuryakh Anticlinorium （North-East of Russia）

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Journal of Earth Science and Engineering 2012年第12期2卷 744-753页

作者： Olga Sotskaya Nikolay Goryachev Elena goryacheva Elena Nikitenko North-East Interdisciplinary Scientific Research Institute n.a. N.A. Shilo Far East Branch Russian Academy of Sciences (NEISRI FEB RAS) Magadan 685000 Russia Matrosov Mine Joint Stock Company Magadan 685000 Russia

The results of investigation of micromineralogy of disseminated-sulphide gold ore deposits of the Yana-Kolyma belt; the investigation was conducted via electron microscopy using a QEMSCAN （Quantitative Evaluation of Minerals by Scanning Electron Microscopy） hardware and software instrument equipped with a Quantax quantitative analysis system. The following micro-mineral phases have been detected： native gold and silver, selenides of Au and Ag （naumanite and fishesserite （？）, hessite, sulfoarsenides of Ni and Co （gersdorffite, cobaltite, rammelsbergite）, molibdenite and platinum group minerals. Our findings in disseminated sulfide ores selenides of Au and Ag, and molybdenite, together with the findings of platinum group minerals and Ni and Co, emphasize the ＂black shale＂ specifics character of these types of deposits.

关键词： Gold deposits micromineralogy electron microscopy black shale selenides of Au and Ag sulfoarsenides of Ni and Co platinum group minerals North-East of Russia.

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