INFLUENCE OF THE MICROTOPOGRAPHY OF REAL SURFACES UPON DRY TECHNICAL CIRCULAR CONTACT IN ELASTO-PLASTIC DOMAIN
Journal Title: TEHNOMUS - Year 2012, Vol 19, Issue 1
Abstract
The paper presents a numerical approach with respect to the influence of the surfaces microtopography upon the dry technical circular contact in elasto-plastic domain, in the case of nolinear hardening. A = 6,35 ball with three different finishing stages (grinding, rough-polishing, smooth-polishing) was considered. The geometry and the microtopography of each ball was measured with the “UBM 14” optical profilometer of the Department of Mechanical Engineering – University of Suceava and was represented both three-dimensional and bi-dimensional (axial section profile). The numerical simulation software developed to this end was able to determine the pressure distribution and the plastic deformations of the contact (.depth and diameter of the plastic imprint) for 6 levels of the load which would determine in a contact of perfectly smooth surfaces maxim hertzian pressures of: 3; 3,5; 4; 4,5; 5; 5,5 and 6 Gpa. The results hereby obtained revealed important characteristics and peculiarities of the stress and strain state.
Authors and Affiliations
Dorel PRODAN, Alexandru POTORAC
Keywords
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