Please use this identifier to cite or link to this item:
http://essuir.sumdu.edu.ua/handle/123456789/18094
Or use following links to share this resource in social networks:
Tweet
Recommend this item
Title | Nonlinear thermodynamic model of boundary friction |
Authors |
Khomenko, Oleksii Vitaliiovych
![]() Liashenko, Yakiv Oleksandrovych ![]() Metlov, L.S. |
ORCID |
http://orcid.org/0000-0001-8755-9592 http://orcid.org/0000-0001-7511-3163 |
Keywords |
phase transition stick-slip regime lubricant friction force shear stresses and strains free energy |
Type | Article |
Date of Issue | 2011 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/18094 |
Publisher | Аllerton Press |
License | Copyright not evaluated |
Citation | I.A. Lyashenko, A.V. Khomenko, L.S. Metlov, Nonlinear thermodynamic model of boundary friction // Journal of Friction and Wear. - Vol.32, No. 2 (2011). - P.113-123. |
Abstract |
Melting of an ultrathin lubricant film confined between two atomically flat surfaces is studied. An excess volume parameter is introduced, the value of which is related to the presence of defects and inhomo-geneities in the lubricant. Via minimization of the free energy, the Landau—Khalatnikov kinetic equation is obtained for this parameter. The kinetic equation is also used for relaxation of elastic strains, which in its explicit form contains the relative shear velocity of the rubbing surfaces. With the numerical solution of these equations, a phase diagram with domains corresponding to the sliding and dry stationary friction regimes is built at a fixed shear velocity. A simple tribological system is used to demonstrate that in the dynamic case, three friction regimes can occur, namely, dry, stick-slip, and sliding friction. It is shown that a lubricant can melt when the shear velocity exceeds a critical value and with elevation of its temperature. The dependence of the dynamic friction force on the pressure applied to the surfaces, the temperature of the lubricant, and the shear velocity is considered. It is shown that growth of pressure leads to the forced ordering and solidification of the lubricant.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/18094 |
Appears in Collections: |
Наукові видання (ЕлІТ) |
Views

1

1

477116553

1

1

435795918

1

1

1

197237642

1

1

62038521

254308

26

2

1

3214064

45911

1

6

-1111113438

174428

477116554

1808228167

6428131
Downloads

39794362

2

1326911374

1

2

-1111113439

1

39794361

394475283

1

1

1

1

1

-1111113437

1

477116552

1808228167

1
Files
File | Size | Format | Downloads |
---|---|---|---|
JFRW113.pdf | 286.19 kB | Adobe PDF | 1864093236 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.