To investigate the pressure distribution and the stress state in a real elasto-plastic circular contact, bearing balls of two different degrees of surface finishing were used. These were pressed against a polished flat surface made of softer steel. The surface microtopography data measured in each case by a laser profilometry was introduced in a numerical program developed to evaluate the pressure distribution, stress state and residual deformations for an elasto-plastic material with non-linear hardening. The dimension of calculated contact plastic deformations compare favorably with those found experimentally by aid of a laser profilometer.
Theoretical and Experimental Investigations of an Elasto-Plastic Circular Contact Bounded by Real Rough Surfaces
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Prodan, D, & Diaconescu, E. "Theoretical and Experimental Investigations of an Elasto-Plastic Circular Contact Bounded by Real Rough Surfaces." Proceedings of the STLE/ASME 2003 International Joint Tribology Conference. Contact Mechanics. Ponte Vedra Beach, Florida, USA. October 26–29, 2003. pp. 141-148. ASME. https://doi.org/10.1115/2003-TRIB-0281
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