Title: Numerical solution of contact pressure in lubricated non-smooth point contact using convolution algorithms

Authors: I. Ficza; M. Vaverka; M. Hartl

Addresses: Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, Brno 61669, Czech Republic ' Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, Brno 61669, Czech Republic ' Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, Brno 61669, Czech Republic

Abstract: Machine parts with non-conformal contact surfaces can operate with thin lubrication film. In the vicinity of asperities or micro-dents, significant fluctuations in lubricant film thickness and in contact pressure occur, which can have positive or negative effects on lubrication efficiency and contact fatigue life. The knowledge of mentioned quantities is necessary for assessment of these effects. Presented work is concerned with improved technique for numerical determination of pressure from measured film thickness using the inverse elasticity theory whereas the time consuming calculation is enhanced by rapid convolution. The solution of other partial calculation difficulties is discussed, too.

Keywords: convolution algorithms; elastohydrodynamics; EHD; mixed lubrication; contact pressure; dents; tribology; machine parts; lubricant film thickness; lubrication efficiency; contact fatigue life; inverse elasticity theory.

DOI: 10.1504/IJCSE.2014.064530

International Journal of Computational Science and Engineering, 2014 Vol.9 No.5/6, pp.457 - 464

Received: 18 Jan 2012
Accepted: 01 Jul 2012
Published online: 22 Sep 2014 *

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