Research Papers: Friction & Wear

Analysis of Friction and Stabilized Wear in the Area of Mechanical Energy Dissipation

[+] Author and Article Information
Maria Maciąg

Chair of Information Technology,
Technical University of Radom,
ul. Malczewskiego 29,
Radom, 26-600, Poland
e-mail: maria-maciag@wp.pl

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received July 20, 2012; final manuscript received March 11, 2013; published online June 4, 2013. Assoc. Editor: George K. Nikas.

J. Tribol 135(4), 041601 (Jun 04, 2013) (7 pages) Paper No: TRIB-12-1117; doi: 10.1115/1.4024047 History: Received July 20, 2012; Revised March 11, 2013

Friction, its concomitant thermal processes and wear are analyzed in a tribological system which is formed by a separate fragment of a friction pair element where mechanical energy is dissipated. A phenomenological (macroscopic) interpretation of stationary processes in a thermodynamic perspective is proposed. The tribological system is assumed to form an open thermodynamic system. An original model of a frictional source of heat is formulated. Balancing of mass and energy, especially the first law of thermodynamics, is employed in the discussion. Analytical dependences are found between work of friction, wear, heat of friction, heat carried away to the environment, and physical properties of the system material are determined. Variation of the system temperature and dimensions of the energy dissipation region are taken into consideration. The proposed model is illustrated by means of selected tests. Reference is made to an earlier, energetic interpretation of friction and its associated processes (Maciąg, M., 2010, “Thermodynamic Model of the Metallic Friction Process,” ASME J. Tribol., 132(3), pp. 1–7). A method of defining a tribological system and a new mechanism of frictional heating are some of the original elements. Introduction of these elements to equations of mass and energy balances resulted in new analytical dependences characterizing properties of a tribological system.

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Grahic Jump Location
Fig. 1

Volume of friction pair element Anδ where mechanical energy dissipation occurs as a tribological system: (a) cubicoid area of dissipation and (b) cylindrical area of dissipation

Grahic Jump Location
Fig. 2

Diagram for analysis of friction surface temperature Θ with a system of two thermocouples: 1 is specimen, 2 and 3 are thermocouples, 4 is specimen clamp, 5 is counterspecimen, and 6 is counterspecimen clamp




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